Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cd4511e6f02d838…

MALICIOUS

PDF

69.5 KB Created: 2020-12-15 13:24:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 52bd8699232582b97f2cc5f89d4b5beb SHA-1: d7a1faf9536e1fa9250a180ed564e0feb7c421d6 SHA-256: 7cd4511e6f02d8389a4a9c025ea0af20deaa58fed6f5b85a87bd94a480e7bccd
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning and phishing. The primary URL, 'https://traffset.ru/123?utm_term=snake+game+world+record', suggests a lure related to a popular game to entice clicks. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/123?utm_term=snake+game+world+record PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380883/normal_5f8f9f83b4c9b.pdfIn PDF document text
    • https://rurasaza.weebly.com/uploads/1/3/4/8/134869927/jexorogokejevuzobe.pdfIn PDF document text
    • https://nodimawajovuri.weebly.com/uploads/1/3/4/4/134431691/zowewavuge.pdfIn PDF document text
    • https://zokoniwimotapo.weebly.com/uploads/1/3/4/5/134579139/83df78c54440.pdfIn PDF document text
    • https://fomukudir.weebly.com/uploads/1/3/4/4/134403856/jozijemusurosuzez.pdfIn PDF document text
    • https://mufudoxideli.weebly.com/uploads/1/3/4/5/134508761/sexudiziw.pdfIn PDF document text
    • https://gujojiri.weebly.com/uploads/1/3/4/4/134434224/ee30060a055e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5f8a9b318e29c.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/wegugus/calculer_le_pourcentage_formule.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/flag_pole_antenna_hf_build.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/85676593839.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/notepad_xml_plugin_dll.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_off0000c631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC631 5000 bytes
SHA-256: b36d986d14cca4f70f22176d16fe9d2823ffe0ece5eb53ff343fda2aaab88883
font_01_sfnt_off0000d718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD718 10540 bytes
SHA-256: eec4d3e6929a263292f9600f695f4f503fdec84cd6cdd13318052ab81ea20d89
font_02_sfnt_off0000fb2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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