Malicious PDF — malware analysis report

Static analysis result for SHA-256 059bdb987c761c2d…

MALICIOUS

PDF

148.9 KB Created: 2021-07-17 02:29:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a120f2d2b8850ed7881dae874d4a7f86 SHA-1: 1b3743ad8de282406a4ebee4fe4ad455413954ca SHA-256: 059bdb987c761c2da76e143e8db9ebabdc994f79aa897c649c53288c80e70b42
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links. The heuristic 'SE_LOLBIN_RUN_COMMAND' also indicates suspicious command-line related activity within the document's structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9742

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://kimtuong.vn/isc/public/files/fckupload/file/56707731691.pdf In PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b18124641e---zuranigakoxukegujebezozis.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/1011f9d3ae6c0fe6aeb3d2a270157ebf/ravomolowupinorujop.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1609db5fb21f66---11246802194.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/aa5qaeigbpkq5dgcv8dre1cmd8/tuxujatinawamekowi.pdfIn PDF document text
    • https://gtselect.fr/ckfinder/userfiles/files/55379481967.pdfIn PDF document text
    • http://www.conectadoscomdeus.tv/arquivos/file/dumedubudajijabi.pdfIn macro / runtime command snippet
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098549d167c2---zixiwebuwivifatidiwovo.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b60ea72287---8056815891.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aed5e7e9083---10900605942.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/rurujejasumixizajup.pdfIn PDF document text
    • https://activepymes.com/pub/file/sozitefi.pdfIn PDF document text
    • http://vetranhtuong.info/luutru/files/gofibamikubawarerowemen.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/59s1l6rm096u1e37vjdhpgr5le/15691895945.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa4aedc8fa---givadenofanul.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/jeluwedevot.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/80896384184.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/gikakaj.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7f7d40169---26914167305.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/qspvblm4j085i4pn6sr7tuav6d/83104826943.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/lbmsn6485qed83o45fag83qt7n/70671184208.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/3750062729.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/ec44028f53396fbd29509f839323b249/vesupevo.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/2d94231e62a8efb92f5481c9defffce0/49390618047.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f2a4d397d---karitizamupuz.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/2b4h1l274iuolmjaifmgj9f4l1/67186753718.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a43000c0c---wimurezimafoz.pdfIn PDF document text
    • https://gtselect.fr/ckfinder/useIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=profoundly+gifted+studentsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E5DE 18916 bytes
SHA-256: 1681ae6905e4a43449dcf78bad669bd4f29826aafec68823630c58bf8e0ee494
font_01_sfnt_off000216bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x216BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00022ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22ED6 10584 bytes
SHA-256: 1ba580bbb9d6e357122912eb50c11b48bd6897f921baac6c545ed4e2bcb0e9f1

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