Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e2793ac16d8c2fc…

MALICIOUS

PDF

93.6 KB Created: 2021-07-21 08:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 29bf67d7ae1807254b96bb3c272da4f4 SHA-1: bfb83c6b14a3d4a88b35684453e5989de40db927 SHA-256: 0e2793ac16d8c2fcf32d4aa66d20aafea2b312f4c3081ab4aecb9c1a06414f87
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, a common tactic for distributing malicious content or phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the presence of numerous URLs on compromised infrastructure suggests a redirection chain designed to lead the user to a harmful destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a87e2782617---bumapumumebusemapukiso.pdf In PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/qqbet09nm5efrolorfnfjmje6v/dixuf.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/bc4bff80dead3e7de82b268baac7c699/pizuxi.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/65407334499.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/824130276d89db8c672cb2665581a108/xixogejobelivebonotexop.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d62b61163---64303002300.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1481dc608e---14117488534.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f282c7d270---lunawasavuxanofojutoje.pdfIn PDF document text
    • https://sportsslife.net/upload/ckfinder/files/mibeworipoxelu.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/widofinawebodebasu.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/saligo.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e32e34e34cc---20196199553.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160da6dee78d3a---89595617045.pdfIn PDF document text
    • http://thetachikappasigmaalumni.org/clients/5/56/56ac51e2ee760b54d3ff8b7d53c877b7/File/ludimaduf.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160a04317d3670---33101431210.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/vabuzajezofodonixoron.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/63atf806nmna17huda69533a56/24705592571.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/e51c965275cfa10b3c56ea8aa05bcda5/46440824008.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/725183feb29f4664c62f99177df0ec51/solozuruxosezej.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/1e9eb5dcfcbf9bd41dfc5e2326415015/92014211174.pdfIn PDF document text
    • https://preciseenergygroup.com/media/53698827762.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/16704650507.pdfIn PDF document text
    • https://lapakunited.com/contents//files/76297957410.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/g41to0dko7q5ipe9jrp25eb2t6/gujojo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=the+geminid+meteor+showerPDF 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_off000108dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DC 10536 bytes
SHA-256: e1ad3fc5996a7a9c730dffb40e69077a802f36cacd87e99f4e08f323cd382904
font_01_sfnt_off00012080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12080 18732 bytes
SHA-256: 0806c35e89ac7953e783ceca7242264641601f8c8c2c62debb22b357425fea86
font_02_sfnt_off000151eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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