Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c0b196f56e2557e…

MALICIOUS

PDF

68.2 KB Created: 2020-12-17 04:31:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f483f41bee61f4b7d232bac98b4880a SHA-1: 6ad1b9d972e02f0d14f3f6eb1d1458bd639c109d SHA-256: 3c0b196f56e2557ebdc89109f5941608780c1b53309b975d8b0c947e809bcf65
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary malicious URL identified as 'https://traffnew.ru/strik?utm_term=giuseppe+maggio+wife'. This suggests a phishing or link-farming attack pattern. The presence of PDF-specific heuristics like 'PDF_SEO_LINK_FARM' and 'PDF_URI' further supports this, indicating the document is designed to redirect users to potentially harmful content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffnew.ru/strik?utm_term=giuseppe+maggio+wife
    • https://cdn-cms.f-static.net/uploads/4368506/normal_5f91f2e5af8ef.pdf
    • https://kuginipa.weebly.com/uploads/1/3/4/8/134853520/revoposiwoteb-liverak.pdf
    • https://nogulumu.weebly.com/uploads/1/3/4/4/134476008/xotufiporik_tajifesekowuwi_zobovezumolib.pdf
    • https://cdn-cms.f-static.net/uploads/4489740/normal_5fbe6770931ac.pdf
    • https://kivalake.weebly.com/uploads/1/3/4/8/134885121/7712478.pdf
    • https://raxorevowipafe.weebly.com/uploads/1/3/4/7/134765671/2565037.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc4da4c2cf09257bd84ffe6/t/5fc7e443e67fb654ad742a79/1606935620222/rujedafozuvudi.pdf
    • https://s3.amazonaws.com/xalexojaxipud/sanulejifelomefatapuxut.pdf
    • https://s3.amazonaws.com/pivetuzadujo/dewalt_router_template_guide_set.pdf
    • https://static1.squarespace.com/static/5fc4daea8787e879898531d2/t/5fc53e303c6ccf69f30a09bb/1606762033523/83207819632.pdf
    • https://s3.amazonaws.com/davolazupivowi/poorly_written_argumentative_essays.pdf
    • https://s3.amazonaws.com/simujix/mejexapoloxonixe.pdf
    • https://s3.amazonaws.com/baxunaf/axel_f_easy_piano_sheet_music.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c998.bin
1cd68b79336ac76ac115f691b8931c095ce85e1600c6fb86c0b85f12c1a13768
pdf-font-stream PDF embedded font (sfnt) at offset 0xC998 5216 bytes
font_01_sfnt_off0000db63.bin
563293ca10676a50a398f48bf332b7e2b3db7691a71b41120c213084792bf58a
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB63 12048 bytes