Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b3ebd25951aaa8…

MALICIOUS

PDF

125.5 KB Created: 2020-12-05 01:42:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9447886bd9136604abcfd3935c039bd5 SHA-1: 3908721adcb432cb59ab2b12ae8a329c72d14f51 SHA-256: 22b3ebd25951aaa892d7bcf591aa8637860ad36ab929272d6ac87d7aae7a1102
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, with one suspicious URL pointing to 'trafftec.ru'. The PDF_SEO_LINK_FARM heuristic suggests a deliberate attempt to create a link farm, likely for SEO manipulation or to distribute malware. No scripts were extracted, but the presence of numerous external links indicates an attempt to redirect the user to potentially malicious sites.

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://trafftec.ru/wb?keyword=operacija%20jesen%2094%20pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464314/normal_5fa23dc055f7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5f929874cfb80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408582/normal_5fbdd1e34e580.pdfIn PDF document text
    • https://liziruji.weebly.com/uploads/1/3/4/3/134380663/1796012.pdfIn PDF document text
    • https://pebiname.weebly.com/uploads/1/3/1/4/131453048/faragidene-guragodila.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374847/normal_5f891ca83b884.pdfIn PDF document text
    • https://kiligazifozu.weebly.com/uploads/1/3/4/5/134506598/7bf4371a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/befafuni/compass_learning_odyssey_teacher_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/guide_translate_in_malaysia.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/24236188455.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/faxanaxirusekugo.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/77362022160.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc115d62bbd7406580792b0/t/5fc14a4218e72e5fdb06f050/1606502979612/33232440760.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f25fda6b-7afd-4003-98b4-10fe9517c0a4/41526049263.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_off0001a807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A807 5464 bytes
SHA-256: 4c42a041b021bb6483133b107b41b31799db8a81bae1e024192f125337bce842
font_01_sfnt_off0001baaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BAAF 14900 bytes
SHA-256: de36faaf8c1e72c61253a60adb0a15e9545ab3b1723044b19133a76eb71a7e67

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