Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7732c43a63e91a7…

MALICIOUS

PDF

75.4 KB Created: 2020-12-26 17:18:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: de960a62500e76e72593e061a3d393df SHA-1: fdba488d48b9991d935204f353fe471123bcc6f6 SHA-256: e7732c43a63e91a784c6e66562350f90ed2f1cf808ab2b7c199a099dcc71d68d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' confirm the document's purpose is to drive traffic to potentially malicious sites.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffset.ru/123?utm_term=super+mario+google+play+store PDF link annotation
    • https://cdn.sqhk.co/letojeka/hejdhdw/vefirumafemasa.pdfIn PDF document text
    • https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/rudejonof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368991/normal_5f8f4d96ab29b.pdfIn PDF document text
    • https://nurufumetexode.weebly.com/uploads/1/3/5/3/135323779/powetadow.pdfIn PDF document text
    • https://cdn.sqhk.co/makafabakuna/ihT6jbA/monster_hunter_world_crossplay_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/potexunajo/Qjajchj/hitman_2_silent_assassin_cheats.pdfIn PDF document text
    • https://tudaluvakagovax.weebly.com/uploads/1/3/4/6/134614365/6189683.pdfIn PDF document text
    • https://rupimobo.weebly.com/uploads/1/3/4/8/134891389/bemajisiv.pdfIn PDF document text
    • https://cdn.sqhk.co/xejulonejo/FLShdhi/97890027457.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/betimugi/gilenowifozanege.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/wwwmapquestcom_driving_directions_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/gudoseralewatelev.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/78920139196.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/58514374860.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_off0000eae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE5 5344 bytes
SHA-256: 54ede99e57c086370ff67c0375ab090210e3529f3bc2081ffdf2cb5fc3c869e1
font_01_sfnt_off0000fd01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD01 10504 bytes
SHA-256: 10425dcb28e9de473c2abab453f143e2784b2b86b1373d7d2c1b059c1e82a4ba

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