Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af203941ea216b6…

MALICIOUS

PDF

83.7 KB Created: 2021-09-03 08:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 44ceecfa379cf5c119ac2dd4c0062ce6 SHA-1: f86a3a10f92a0d5998546124e989cb3f9a2b61d2 SHA-256: 4af203941ea216b6e2ed8b87bf2978cede020b8ea441b03f59e3e701d308f964
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of external links, many pointing to compromised WordPress sites and disposable domains, suggesting it functions as a link farm. The embedded URLs are likely intended to lead users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://edu-family72.ru/content/images/uploads/file/89897466419.pdf In PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/3856d5210b4d21e2c902f61a6c87ab07/16982962753.pdfIn PDF document text
    • http://ketnoikienthuc.com/upload/files/golewozolizizijazito.pdfIn PDF document text
    • https://datajournonepal.org/files/goluwisuva.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/1l97dl15rcfuvfrejlge756dvl/wepasewiseten.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092d9cd4dd1f---90691276721.pdfIn PDF document text
    • https://a-pointpro.com/cms/ckfinder/userfiles/files/belebivizat.pdfIn PDF document text
    • http://cameragiaminh.com/upload/files/49415523133.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/i80cgqubop0341jkeulo31cvju/44468964831.pdfIn PDF document text
    • http://richiefamilyreunion.com/clients/7/7d/7d03816b951c94fc7c065ced7c7ccdcd/File/dotawomarofeb.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/86osje0k19hkutttqf53hjo2kh/mijavabolijufunujezexejon.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/91436654002.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/kawulivepakixotifulul.pdfIn PDF document text
    • http://elliptical-trainers.ru/ckfinder/userfiles/files/21109846467.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/62002633805.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/345b3a27ab32284e630ce1375c75503d/59710029188.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/31548918eb790925577797c387bc50c6/38468901056.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16089972604f8e---jigivaluxipipira.pdfIn PDF document text
    • http://jaht.com/userfiles/file/kuxibirin.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/5566b0a5c6c519385f99d1ce68baebb5/84218204761.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/tavozupex.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/8bcd29ecb622ef8bb2ad181fceebc99e/20269324936.pdfIn PDF document text
    • http://pvvc.cz/files/98766959121.pdfIn PDF document text
    • https://ebooksweb.net/files/file/43329049533.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/jotoridivojogipen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=pet+reading+sample+test+pdfPDF 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_off0000e0b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B7 10724 bytes
SHA-256: 882f7d1cad06418ae19f1929f920c960756d2cfd5feb0338db9adebb81b65b53
font_01_sfnt_off0000f90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90C 18496 bytes
SHA-256: 58d38f56ac6c880a1a1a549c3c08db6eac2ffe213b23ca4964d40a07b6d57e98
font_02_sfnt_off0001292c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1292C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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