Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3e2512a17dc5a4…

MALICIOUS

PDF

90.9 KB Created: 2020-11-21 23:53:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b6c374389d4a9036cdbb9790e20994c4 SHA-1: 19b432d424eb869b4775919f6723e975f2e93d62 SHA-256: 3d3e2512a17dc5a4bf3854a6976bc19af58a85f5e91cf44714cc0a1bd27945a8
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 0.9997

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://traffine.ru/aws?utm_term=cbt+therapy+anxiety+worksheets PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451375/normal_5fa0cc15286a1.pdfIn PDF document text
    • https://sefufomoxuve.weebly.com/uploads/1/3/4/5/134528328/zovija_zebora.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367617/normal_5f8eb9327cced.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484820/normal_5fad476cd34f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367923/normal_5fa1c8364c1a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369506/normal_5f894d3ae8a1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481552/normal_5fb4fa1406297.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413121/normal_5fa2149a4ea72.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/8e500fa7-2e34-4336-927a-62d22d527222/50625467232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/308ab40c-033f-4b56-bf9d-319608bfe336/20056530567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/967d45dd-2816-4c61-afa2-32782a0375f4/77295098048.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000127f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F8 5244 bytes
SHA-256: e461eeb92b42d9d8a306a4e0dbc88c67242decc655fc11a00631004e23f256fd
font_01_sfnt_off000139d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139D9 10948 bytes
SHA-256: 383a7301be6a8cec0a5625aaaed94898137f8d6c3f70eacb52efaf008c982cdb

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