Malicious PDF — malware analysis report

Static analysis result for SHA-256 b44f2a18af0268eb…

MALICIOUS

PDF

59.5 KB Created: 2021-04-17 09:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 215ac0011380e7a2625f82ed7e277cb9 SHA-1: 0bd7d55e25a18ae4b909494ff0bd7fd66968f3e8 SHA-256: b44f2a18af0268eb2eb6a18aeb056f200ac80cca90b9d2b85c441fea8f48ab8c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many pointing to disposable hosting services, and a heuristic firing indicating it's a link farm. The document body, though heavily obfuscated, contains text related to search terms, suggesting a lure. The presence of external URIs and the ML classifier output strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9571

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://gimoguvi.ru/strik?utm_term=best+maytag+repair+near+me PDF link annotation
    • https://digulowewuw.weebly.com/uploads/1/3/4/3/134363346/noxaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_6056afeebdf25.pdfIn PDF document text
    • https://xonadenot.weebly.com/uploads/1/3/4/6/134685596/varolorusurix.pdfIn PDF document text
    • http://urro-hu.com/luraresefukelcy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402486/normal_6036a4b968b88.pdfIn PDF document text
    • https://sijotifibiga.weebly.com/uploads/1/3/0/9/130969940/7034687.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407304/normal_6043f1b19a1c9.pdfIn PDF document text
    • https://cdn.sqhk.co/lilanoto/jcjgeDu/befevo.pdfIn PDF document text
    • https://wufaxewixebel.weebly.com/uploads/1/3/5/3/135302410/fesaweru.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/qCFbfIF/free_funeral_program_brochure_psd_template.pdfIn PDF document text
    • https://wozukepob.weebly.com/uploads/1/3/4/0/134017809/labilofigife.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417669/normal_6003878bd816f.pdfIn PDF document text
    • http://contentmedialiteracy.com/wefojagimiz64vun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_6050c6c922f2a.pdfIn PDF document text
    • http://alphabitx.com/nys_driver_license_mailing_statuszhytb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426277/normal_606a2d741a455.pdfIn PDF document text
    • http://apeech.ru/89785644806m78gk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/xajoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/54479667779.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FE 5256 bytes
SHA-256: 854da6c1f1328d0f9bcd9af2a71e4e2094c68e139a266b2df847d11cfbbe95f8