Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e80424f6a944eb…

MALICIOUS

PDF

75.1 KB Created: 2021-08-02 11:29:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c8d1c8e60c04e9826fcc7d01fbd903a7 SHA-1: b21e92b54d39a9ebb947a9ea8aeccd7de0fcc9f8 SHA-256: 38e80424f6a944eb5f9afb1b38236a62b3d2648bf9dd86262442bb480de33e87
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as a malicious phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, many of which are hosted on compromised CMS platforms. The primary purpose appears to be directing users to external, potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/5cab01f49de4644ccdbd2ebd289fffd5/xipaduvuwetejigazogupur.pdf In PDF document text
    • https://arvikabc.com/images/uploadedimages/file/14790282961.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/50778199602.pdfIn PDF document text
    • https://daxitrip.com/basefile/daxitripcom/files/gofasanawutuvogumamusifir.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b1c0315e0---kosevuxebigerofemobofipo.pdfIn PDF document text
    • http://goodwynva.com/clients/d/de/de91e19d235d8a3764238851c6b73f99/File/29952461889.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/83321015058.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/b8rkgmjc2q2tr20vd2u1sfpa4q/dixamezoxuvajodeje.pdfIn PDF document text
    • https://cargobull.cz/res/file/10735630703.pdfIn PDF document text
    • http://smarttechsolutionukltd.com/uploaded_files/userfiles/files/81785331556.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160728957da13e---salikani.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/26827459056.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/tizudatirolutizekev.pdfIn PDF document text
    • http://cuacuontoanthang.com/media/file/31378541237.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b9a8d249e---tomerajezufelo.pdfIn PDF document text
    • http://latexindia.com/userfiles/file/razetagikerazejiroguxi.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160fbcdb8bb3dc---bofinonuritu.pdfIn PDF document text
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/fixesogutos.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/d0ib0jd8o60gnun0v7iqhpudf9/40506391423.pdfIn PDF document text
    • http://abwingstop.com/uploads/files/vitujikeromawejukeru.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/kuh0mldmr7fvksoovmlid2vmpm/sedololijekoke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=cd+size+template+wordPDF 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_off0000c415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC415 10628 bytes
SHA-256: 41f34256758ff5766b24a401ca464c901bdec740b537a1fbe35e92f76d77a611
font_01_sfnt_off0000dc86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF498 16444 bytes
SHA-256: ccb02145e3b075cec7e9782073030906a9a5ca75876183c4f0afd4cce4e0ce0e

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