Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e094a8307a6ad2b…

MALICIOUS

PDF

72.0 KB Created: 2021-01-01 06:18:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6111c64b29a5dd4cdbc0c0dd93a4d398 SHA-1: 1838f665b67d85f0b82712bfb2f652ed4aa279e3 SHA-256: 8e094a8307a6ad2bc33415cafd1c1304e19c3190ef86374b8bd9db49026afcbd
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, with a critical heuristic identifying it as part of a link farm designed to manipulate search engine results or direct users to malicious sites. The primary malicious URL identified is trafftec.ru, which is likely used to redirect users to further malicious content or phishing pages. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest an attempt to redirect users, aligning with phishing or SEO spam tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/strik?utm_term=best+free+piano+lessons+online PDF link annotation
    • https://bekazavaf.weebly.com/uploads/1/3/5/3/135327011/5241257.pdfIn PDF document text
    • https://figuzejigof.weebly.com/uploads/1/3/4/6/134644002/2350bd60bdf16d4.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/Pjhbhdz/lexazulibakimota.pdfIn PDF document text
    • https://xukexepizebeb.weebly.com/uploads/1/3/4/5/134592509/jufawegiluwuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ed3f9fe-9c5c-4758-9441-59ce3d086907/tifuvaxojepupiterimaxas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d67146b3-be29-4c80-bf0c-424aa78199b3/10495836110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2e02536-e64a-45ff-9468-7a479c237806/tedasako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6742e5d-ab5b-4453-b250-a7d6256397c3/basketball_shoes_kyrie_5.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/photomath_camera_calculator_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d93a6fa3-c839-4c2b-a6a9-5b7ffd4545be/love_in_tennis_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/vojumokomirakuxe.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/rasifugugugovorozuwijufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09607827-8bb6-49b3-a55e-8680f1c73b30/86842386378.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_off0000dde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE4 4944 bytes
SHA-256: c14edc06afed4ebe957bc5aed9e22c74d5fda86cd622d07e7259e77e6266d750
font_01_sfnt_off0000eec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC5 10744 bytes
SHA-256: eff55f4b9790cead78ff5fe2ca5522f0afb4e82b34a5af37b4a624fc98290db7

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