Malicious PDF — malware analysis report

Static analysis result for SHA-256 e97236a07051a490…

MALICIOUS

PDF

78.5 KB Created: 2021-06-30 03:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 086ad8fcdf8d6d06d565bd4de66c0b3b SHA-1: b9a1208b01234671a0dd317b10dc05d9b024d2de SHA-256: e97236a07051a490f0a0577623b2915816f7a5adc89b18741247a3d1f9aae8d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many of which point to compromised or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crysiq.ru/uplcv?utm_term=well+it%27s+a+marvelous+night+for+a+moondance PDF link annotation
    • http://dioceseofniranam.org/userfiles/file/54748764552.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/bixizaradodizaga.pdfIn PDF document text
    • http://tmtechvn.com/webroot/img/files/lipivefi.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/dabomorozirunonebepifepe.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ae35adde3---jivuzaxuzogolibifovonez.pdfIn PDF document text
    • http://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/rj6f9d4oeegdmlekgvqvghi0a5/49833275615.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a068c6d28e1---25777237683.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/26399360218.pdfIn PDF document text
    • https://bajrahrs.com/userfiles/file/zudodiresefasusudonidoro.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85e6eab75a---27307414990.pdfIn PDF document text
    • https://noticky.net/akce/fotky/file/53655255617.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16073fde541274---dosokeket.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/526845217c12d1417be305f83e504ff2/wajola.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/e1a3c6f299ee141502e45c2df4bf66f8/zamukajijotimapumuwaz.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/065bacf549d0d519c82f7dac80f4511d/36365933201.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021060408124573499.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021052212380910.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/pakulusosexamuzukinunow.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/961cd2f513afcebc5e4185816ae6afa3/wevanejiserabewemu.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/9486aa2c1de043a5bed5e113577c43c7/41413136674.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/a444877490b5ae1726c300a76d24b662/movosoviwowetatate.pdfIn PDF document text
    • http://onmamtour.com/FileData/ckfinder/files/20210630_2A7FD9FBE9B5A68A.pdfIn PDF document text
    • http://josepholszowka.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/88036818253.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b2812a4c533---86492746074.pdfIn PDF document text
    • http://instandee.com/Images_upload/files/manuzatipis.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC763 11116 bytes
SHA-256: 7554b2bc472c495a1b2abaf6b758c2dbbaa2a757aa7a17ece70ee7862f1fbf7b
font_01_sfnt_off0000e104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE104 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF916 15464 bytes
SHA-256: b335bbdd69221ca6deebb227fb5aa051d33adc4854e9fd0c0f1e4052dbbcf145
font_03_sfnt_off000120ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120ED 2056 bytes
SHA-256: 4563f17dfe3a5ebec18f1a36f412a2bf74cdd475b572d4828d4629e86790803c

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