Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9dfb642ed195d24…

MALICIOUS

PDF

69.8 KB Created: 2021-03-30 19:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d828015a753c0eed63fe6a3012d535a5 SHA-1: 2338fe05325125d7702e0e113c1126707b895eef SHA-256: d9dfb642ed195d24b941dbba4eb7da069966e92343378e24115cd005c8133f68
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external sites, many of which are hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, references 'Viper 7145v remote start manual', which is likely a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/strik?utm_term=viper+7145v+remote+start+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481286/normal_5ffcca17d04ec.pdfIn PDF document text
    • https://vogaxuruxav.weebly.com/uploads/1/3/4/3/134352923/9283593.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480591/normal_6009949db55f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474192/normal_60360318b4866.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457311/normal_5fe79aac5e3ce.pdfIn PDF document text
    • http://henrysavbr.site/como_programar_control_universal_radd176m.pdfIn PDF document text
    • https://nujirami.weebly.com/uploads/1/3/1/3/131384028/0ecb614.pdfIn PDF document text
    • https://nimidakotogala.weebly.com/uploads/1/3/0/8/130874585/9141756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465538/normal_6046a9393532a.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/61834536505.pdfIn PDF document text
    • http://wumomotetidofe.getenjoyment.net/sujomom.pdfIn PDF document text
    • https://sopebanodi.weebly.com/uploads/1/3/4/0/134017095/d416c.pdfIn PDF document text
    • http://wonnaturila.space/fps_cao_no_root_apkrs0xa.pdfIn PDF document text
    • https://xemibunadagom.weebly.com/uploads/1/3/4/6/134639404/b34249ca384.pdfIn PDF document text
    • http://enots.space/halloween_face_mask_near_me3cnj5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448743/normal_605318c775604.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465010/normal_5fc90c9022bec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/28c3d005-b942-4d98-b5b3-90b4a3073c6d/denuzafilorusapifokomewov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a57c159-1aba-4dc1-bf03-a6acdac8770e/the_full_armour_of_god_prayer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ae67279-1724-48a9-a93a-1d4037fbe6ff/63295921074.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD392 5332 bytes
SHA-256: d6e2eefb519e580dcd42fb523a715bf95c46e4c507b006e82d78306f4eb677f4
font_01_sfnt_off0000e5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B7 10624 bytes
SHA-256: 18189debb7f7c0d042acaa24167a72a2367feda7577d637f20de79cf4b3c44b5

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