Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6b0d91ad68a7e96…

MALICIOUS

PDF

57.0 KB Created: 2020-12-03 17:36:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e0a054fe4e4117bf71304c33f8ade2e1 SHA-1: b6b719a17e2252bec4ffb7fd4c496c06669fea7d SHA-256: f6b0d91ad68a7e965974d9ebbccea99a30b26f482bdeabab3a547ba08605e2e0
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to 'https://trafffi.ru/aws?utm_term=ansys+19.+2+manual+pdf', which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests it is presented as a PDF document related to 'Ansys 19.2 manual pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://trafffi.ru/aws?utm_term=ansys+19.+2+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369936/normal_5f89701892bb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464082/normal_5fc3168582213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378834/normal_5fa7d18d3dad3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376612/normal_5fbf5da9d3d58.pdfIn PDF document text
    • https://pepotoxuxomupav.weebly.com/uploads/1/3/1/4/131483830/ae6209b98.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc67dd2abaecd331848a494/t/5fc6bc3d2ac13f1ee9a268ae/1606859839269/nhl_21_player_ratings_islanders.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0154f3de5e49b52aa70f/1606287701331/highway_construction_cost_per_mile.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc007006609fd0ee78c7004/t/5fc102dd5147b14804579370/1606484701394/rosaralul.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d95bbdb33045eee4110e/t/5fc60f48f8cdb769c6b32bb2/1606815564707/90032526416.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc378c5085bf90c0e0d73db/t/5fc6a88b1972c46e3c89ce3f/1606854796459/samuketosun.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10aaaf9866f3fd2d521c0/t/5fc167a908845d0924bf7d79/1606510505392/12177293527.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3aed99955c744b54ce5b8/t/5fc492723c02f22b9d9ee23b/1606718067233/army_ranks_enlisted_pay.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_off0000a91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA91C 5556 bytes
SHA-256: 95a6b788682020bae344b3815345b19961142f4d0496a51e2df1a82506b6a003
font_01_sfnt_off0000bc0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC0F 8164 bytes
SHA-256: a16da497cc48f97f9651ab5d5a0a50427a210f24912eeef97a3991e5ccf59518

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