Malicious PDF — malware analysis report

Static analysis result for SHA-256 383e8346ab1f6400…

MALICIOUS

PDF

80.0 KB Created: 2021-06-26 22:17:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8d7cc14d913f3dd52995efcf0ca06018 SHA-1: dcf63e9491169cfe20435247c7079c39f9903cbe SHA-256: 383e8346ab1f6400650080f9a2810fd5730deba78e16b54081c99d5f6f872d9e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://olivierdaulte.com/ckfinder/userfiles/files/41537591706.pdf
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/00cbe58742c32a7ba6df5fa9ba90216c/tumugusuxub.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/nl0opu62hlu7peqs2s7hn9bb57/4266254487.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acab00900a9---47706233724.pdf
    • http://dianacb.cz/userfiles/file/majagitotesuvi.pdf
    • http://driver-jazda.pl/upload/file/51950802442.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8e1ab09de---bapozajojiwevawumefebivin.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e0702141c---28735220631.pdf
    • http://moyamoya.center/images/hand_uploaded/files/lotuvatosapumokubaguxo.pdf
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/4qdg8btkj2u9u2kniv0pdli6kh/rejefikafipememufope.pdf
    • http://iccarrentals.com/files/file/rakiwo.pdf
    • http://asesorgubernamental.com/images/file/zokenaxo.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609481701691e---getowa.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cd8505f3a00---81372983316.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16070a235a85fd---bevezodanewunapalutin.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/90ee77ea24867d07e11b638fd7a751e9/zurenidibesifi.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/0ndq44ch7d79i0jb5qtmj3vsu0/xirivuterelixo.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b5870dc92ca---53385209854.pdf
    • http://joyear.com/ckfinder/userfiles/files/kugafopedurobagubumup.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8f56e29e8---manesesonigozupunef.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe9c8b81af---pebefoboxokebodisarewoku.pdf
    • http://melly-incendie.fr/img_db/kejuxujuwezifoxuj.pdf
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/1dhda489b27oeegkf5hjmtha2kegqr9d/72296776999.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160afcf30908b6---nowivudexepa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=seedfolks+study+guide
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d673.bin
19c2ad8cc59f34c2d91566f5f9d7a8352f9e57848dde1269da675ceadc9f9c66
pdf-font-stream PDF embedded font (sfnt) at offset 0xD673 17272 bytes
font_01_sfnt_off000102ab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x102AB 16792 bytes
font_02_sfnt_off00011ac2.bin
e4d1b929099043e670bf76f9926e40712071de4ca4fac6c8d0094edd7bcce770
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC2 10544 bytes