Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2cab5a909f0c76e…

MALICIOUS

PDF

84.3 KB Created: 2020-12-05 19:32:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5ada32ec4b48e7abd0d7aa2b669ff9dc SHA-1: 93a214712cc1cf447ff52a27f8b69e50a22fcd1b SHA-256: d2cab5a909f0c76e723537a0b156958ce3c7416ecbf17a9880e1211a1a1f534c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://traffking.ru/123?utm_term=american+family+fields+of+phoenix+stadium PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f9196b991e7e.pdfIn PDF document text
    • https://xuvosaxefon.weebly.com/uploads/1/3/4/6/134605895/sesojuzeju_rapif_rexepa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375541/normal_5fcb55ba5b29b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499984/normal_5fb8f0a7e82d2.pdfIn PDF document text
    • https://sutukukibefatu.weebly.com/uploads/1/3/4/4/134486522/1859753.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371272/normal_5f93065dbb290.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f8de99e4b260.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/jobavo/nigeria_flag_colors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/087fa596-7c8c-4c2d-9845-3527efab7013/62592469580.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/fuxolaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23a052b9-8dd3-4b22-ab97-db40838c3b18/78700807606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b95b754-af98-4219-9f79-38a1cde40200/vavadonadonorawuziwiduze.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011e86.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11E86 21224 bytes
SHA-256: f05fd7549149808744b5c5618c72f26ac34fd57d773b4a62bee4f401fd892979
font_00_sfnt_off0000e535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE535 5556 bytes
SHA-256: a407d3aeb5d0b68bd367198f503fe70945716fb58a76da677a56f4d4f718b0b2
font_01_sfnt_off0000f7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FF 11284 bytes
SHA-256: a6e2207ede5deb3ddbafd9bbc7d6f201a9db1c3497597c4603d730f02824cd52

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