Malicious PDF — malware analysis report

Static analysis result for SHA-256 e93170fb3a24f011…

MALICIOUS

PDF

67.3 KB Created: 2020-11-17 22:58:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f29ba57f8c964c90893648620f9cc9b8 SHA-1: de6692464e0f796267d82d3a78e4fffb98c4c08b SHA-256: e93170fb3a24f01127af7f78a45f2822fb50078576096b9a949da505d42f8cdf
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafffe.ru/123?utm_term=train+from+new+york+to+boston+price PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412570/normal_5f97fa76c9bdf.pdfIn PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/519a093493f70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387589/normal_5f9a0840c56d7.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/1aff6c6c.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/pewebopufupe/zoneg.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/awaken_the_giant_within_you.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/arati_sangrah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5ce79b7-4f38-4fd0-9eda-112c36b41dda/nuzetoge.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/82667397636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/577d7a04-bf71-43a0-a5b1-48c1081f137d/xuxosarowojilibizibupewo.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/3.4.1.2_lab_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/90338291513.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/thyristor_applications.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_off0000c928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC928 5476 bytes
SHA-256: 91a90ea04e1917e8514a11104efb0a880f39b26f9d1b5022917c2ff1cd9767a3
font_01_sfnt_off0000dbcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCC 10740 bytes
SHA-256: 74e90773f14d8733a9e6d17bb7b57ca95e6d548739f159793153070229ff7b1b