Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b86b1d4fd1e472…

MALICIOUS

PDF

63.5 KB Created: 2020-12-08 19:22:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7227bfd67cb12b08a1a3b913315c5819 SHA-1: 92db363f874d2436957bdc949681a7a17b78b9eb SHA-256: a7b86b1d4fd1e472650ccace17540a2560319f0a5420d9bcf12979aed4f25ca5
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/strik?utm_term=ace+gangster+3d+unblocked'. This indicates the document's primary purpose is to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/strik?utm_term=ace+gangster+3d+unblocked In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381085/normal_5fbc37a6a4c90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368997/normal_5fb85c52d4903.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393754/normal_5f96c6ecbcb91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375204/normal_5f9854c46677f.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/5fc57f453398ff75154cec93/t/5fc649899b1ed03538b3ad98/1606830474150/gx_monsters_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc38c0cea4a794d5655cf02/t/5fc4d64d4f983757207719f5/1606735438176/wavigobe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffe9d5687f52b6b7c161f/t/5fc2d3d79ee0f32b87b13921/1606603735983/mp4hdmovies_download_free_2017.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc793749d43d906ac0e803b/t/5fcb14c2a51c5a1401a3cf3f/1607144643294/kanto_region_pokedex_pokemon_go.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdee0d173fb5383b66ebba/1606282765397/dugowemosemelexosesipul.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/vocabulary_words_for_ancient_egypt.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50f32ea4a794d565fe5d6/t/5fc94dbe1518c7693640a137/1607028159538/30413616333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7e2c371-81e6-40c0-9db8-426d1d00a207/69495400460.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc68eac104edf1d77a85ca7/t/5fcbf3267ae85b53b27ab8a4/1607201575317/49931597840.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_off0000bcbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCBE 5464 bytes
SHA-256: 1933f7354d2a3f766750a1250009f0a4c539b92ff908a9d4dcaf4ae589ccd3c1
font_01_sfnt_off0000cf61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF61 9984 bytes
SHA-256: c7f6a8c971c7a66340f0e6a386e98ba4505a6c35520d427956daf0c73d57fbdb

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