Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1b012567989960e…

MALICIOUS

PDF

79.4 KB Created: 2021-03-03 11:02:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 91a863bb47e0d4088cfe8db052b531d5 SHA-1: c1ce9456f38d810da840f67c3b4917f821b45b79 SHA-256: f1b012567989960e7e71886ae748e5329cadf4c6b2a3f36da8c0e5350b05f537
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one prominently featured in the document body and heuristics pointing to a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery via the identified URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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
  • 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://resalured.ru/award?keyword=tarot+card+reading+for+yourself PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425229/normal_601c8da0b759b.pdfIn PDF document text
    • http://videohost.space/nozelupopibibufinolg9ncv.pdfIn PDF document text
    • http://vekvelo.ru/wunajanawakufizujiltpoc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385202/normal_5fff24b59919f.pdfIn PDF document text
    • https://latuguno.weebly.com/uploads/1/3/1/6/131606113/bilagisajolabuwafar.pdfIn PDF document text
    • https://lameperitilexi.weebly.com/uploads/1/3/1/1/131164355/zeduk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374704/normal_5ff45a99df1b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496816/normal_60312c36cc5be.pdfIn PDF document text
    • https://kazubuxupopa.weebly.com/uploads/1/3/2/6/132696048/6123501.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473359/normal_60276ea3445a5.pdfIn PDF document text
    • http://bivoxuwod.iblogger.org/the_north_face_mens_jacket_size_guide.pdfIn PDF document text
    • http://nesobaka9.xyz/photo_video_maker_online_mp3696zn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500187/normal_5fec9ae83a65f.pdfIn PDF document text
    • https://kodabovoxalomas.weebly.com/uploads/1/3/5/3/135340354/mujaf-tawugozev-doguzoxodawar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484618/normal_5fcc0dac21b02.pdfIn PDF document text
    • http://aicberg.net/476273610587mktd.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/kenalulokuk.pdfIn PDF document text
    • http://wuzotevoxed.22web.org/template_birthday_party_invitation.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489598/normal_5fefc5754e019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nukivamo.myartsonline.com/samsung_rs261mdwp_manual.pdfIn PDF document text
    • http://runugerobel.rf.gd/95670688131.pdfIn PDF document text
    • http://difedomuki.epizy.com/6887713288.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD5 5124 bytes
SHA-256: 485cce02d601c794014363166308f70d0d448ca85f9820b563b3bf43fac1958a
font_01_sfnt_off0000ff5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5A 10252 bytes
SHA-256: 86b1497487b742ef0b7081aaf6b27aba5a40b0539db9043d4803406fffeb4b70
font_02_sfnt_off0001222b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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