Malicious PDF — malware analysis report

Static analysis result for SHA-256 74814f006658b11b…

MALICIOUS

PDF

79.5 KB Created: 2021-09-15 23:33:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 08b86d6dc75b2129c96d246ff14bce39 SHA-1: 91418299083a020e595445a889197dd990afbbc5 SHA-256: 74814f006658b11b28176ab2fe156ecb25344ebe18e06734c56b6d6363741861
196 Risk Score

Malware Insights

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

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. Heuristics identified it as a browser extension/update installation lure, a common social engineering technique. Numerous external URIs were found, many pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://garglob.ru/uplcv?utm_term=pokemon+emerald+southern+island+cheat PDF link annotation
    • https://stauber.lt/images/files/lijuketomek.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/17191025456.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/80490543158.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/g6lbta9cp7len1sj1d9pn5qmh6/60408175306.pdfIn PDF document text
    • http://skisun.it/userfiles/files/nefamumedogaf.pdfIn PDF document text
    • https://hinaweb.com/upload/file/nisegabivajetijifekix.pdfIn PDF document text
    • https://cargobull.cz/res/file/sopapiv.pdfIn PDF document text
    • http://nanouklid.cz/upload/file/wekawotapoxiwilolawaze.pdfIn PDF document text
    • https://cukimentescukraszda.hu/files/files/47927813740.pdfIn PDF document text
    • https://giasidaily.com/uploads/userfiles/file/82260611698.pdfIn PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/zipapagekesononeboru.pdfIn PDF document text
    • https://faguaflowers.com/images/admin/file/xaruwixo.pdfIn PDF document text
    • http://flyingkirin.com/uploadfiles/file/120957046077.pdfIn PDF document text
    • http://poliinc.com/upload/files/57522175412.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/87044050796.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/jijononimosefi.pdfIn PDF document text
    • https://anjingliar2.com/contents/files/78224202530.pdfIn PDF document text
    • https://serviceelectric.ca/userfiles/file/mupibokopukulovarem.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/161411cc746132---jivexugipunarefa.pdfIn PDF document text
    • http://wsm.hk/images/files/wuwurojolowabisukoxasa.pdfIn PDF document text
    • https://accidentmatters.com/ckfinder/userfiles/files/90262831222.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/zobonemuwuridizujof.pdfIn PDF document text
    • https://beamstraffic.com/amb/userfiles/file/50111023965.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/5rfsmd14rc3748lrvqbd32gvue/gonuxezeganodepexejep.pdfIn PDF document text
    • http://pho32shabu.com/uploads/files/lokirox.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA0 18636 bytes
SHA-256: 7210c7842d2ba7863400ec1b7fc56914176f4090c6c103b6621d8f20561b2955
font_01_sfnt_off0000feeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11702 10828 bytes
SHA-256: a530dae7b06a5f95fa5862cfe7ea609b1202b0069e46c7c6524efe6dba6dc095

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