Malicious PDF — malware analysis report

Static analysis result for SHA-256 76dbe51ec05a85f5…

MALICIOUS

PDF

73.9 KB Created: 2020-12-13 13:14:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0a57594c67c2b25dc98edbd41012eaf0 SHA-1: 93a9cad9e8fcb6ef91842e39fc62062c7f4bda02 SHA-256: 76dbe51ec05a85f54dd7063de52467dba41592b239ff6f1583d9eb6bc6c78a0e
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, a technique often used for SEO manipulation or to redirect users to phishing sites. The presence of embedded URLs further supports this malicious intent.

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://trafffi.ru/strik?utm_term=lamellar+armour+lacing PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452381/normal_5fc697ff7dc62.pdfIn PDF document text
    • https://gifetapajuloper.weebly.com/uploads/1/3/4/6/134682222/viruwuzesuw_guzulaz_lurivirebit_xelagadibep.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/jasidirijeduno_bimupi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372696/normal_5fb435b5c8192.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406812/normal_5f983ab15fbd1.pdfIn PDF document text
    • https://juleladenoduko.weebly.com/uploads/1/3/4/4/134478401/nuvuk.pdfIn PDF document text
    • https://naxulukituno.weebly.com/uploads/1/3/4/8/134879135/solarebaset.pdfIn PDF document text
    • https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/2a12ce8.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
    • https://static1.squarespace.com/static/5fc4dabec6d96458363b5a9a/t/5fcabc7fa0fc71057d138110/1607122047695/chess_endgame_training_rosen.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4deb9f7cf8c7540443e1f/t/5fc4f573f3de5e49b500d1d5/1606743412674/cyberpunk_2077_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d7ac403f5353fd956fc5/t/5fc2dfd418e72e5fdb3723ce/1606606805577/bear_pride_flag_wallpaper.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5112e12facd59cec7c30d/t/5fc6739f9d793648406b8a9c/1606841257995/16110691128.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0e58645712565401907f/1606291032655/starbucks_frappuccino_glass_bottle_recipe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29a73239b0722913c2875/t/5fcf1fcc505b451de1866929/1607409612843/house_designer_fix_and_flip_game_walkthrough.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc15fabe2fce462bc8f3d9c/t/5fd190328ba64b78df4f77e0/1607569459206/mowudoxajowuxo.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_off0000d707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD707 4684 bytes
SHA-256: 951073004bfd2f0e4f6fbd31281246147ba663663f53564d841172098603fcab
font_01_sfnt_off0000e6ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CE 11168 bytes
SHA-256: 9a2e2a4d70cc10819bfabd152df996f741337637432794ab3cd01fdfffdb3141
font_02_sfnt_off00010c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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