Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b5bdbd4a135ad69…

MALICIOUS

PDF

70.3 KB Created: 2021-01-15 15:33:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: bb95231f46356b99e890dc53faa471cf SHA-1: fecdc71d3216947ca0116a0413e0533e41fa471f SHA-256: 9b5bdbd4a135ad69441495e52c063cb62987421bfd88872ad51e25d1e88b1ba3
176 Risk Score

Malware Insights

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

The file is a PDF that exhibits characteristics of a phishing or scam attempt, specifically a callback lure. It contains numerous external links, with one pointing to a suspicious domain 'trafficel.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to trick users into initiating contact, likely for financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://trafficel.ru/aws?utm_term=polycet+allotment+order PDF link annotation
    • https://cdn.sqhk.co/takodabu/YNjaB5n/video_call_free_app_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382414/normal_5fb8638849415.pdfIn PDF document text
    • https://tudegikugil.weebly.com/uploads/1/3/5/3/135317618/034d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474723/normal_5faa7c43a8f00.pdfIn PDF document text
    • https://cdn.sqhk.co/rewazexi/pjeihjh/mitusafemuremoga.pdfIn PDF document text
    • https://cdn.sqhk.co/dakuwuwuzije/wcrriaj/43524152981.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://s3.amazonaws.com/gifiz/61017268105.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/a_discovery_of_witches_book.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/shankar_movie_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/5172003691.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/fleetwood_mac_the_chain_drum_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/memusufoxexamelasovigatuj.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_off0000cac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC2 4752 bytes
SHA-256: 79bf307fb465ffdfa2cbbd94088db86749aed4b528f2ad4d90fb891275baf909
font_01_sfnt_off0000dac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC0 10520 bytes
SHA-256: 64d074327f4f10b400fce029572a668730282625b223192ada39e4562c7ff531
font_02_sfnt_off0000fe8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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