Malicious PDF — malware analysis report

Static analysis result for SHA-256 c826ac906405b60d…

MALICIOUS

PDF

69.9 KB Created: 2020-11-23 08:07:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8b0fa1ea9fa46b79cc327ce0107f10d2 SHA-1: 9325bff7ef22e1ca8d6ca5ef2fcc09bfeb8e19ac SHA-256: c826ac906405b60d6727ebfe92ecd4d9ef07120dc5b03c34d71bb415a963fd21
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 0.9998

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://traffine.ru/123?utm_term=world+record+shot+put+throw+women%2527s PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368732/normal_5f9538afae11a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370072/normal_5f9dfce585f4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393890/normal_5f9a882bf1e59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417408/normal_5fa4b16f733be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375210/normal_5f93b7d8e2f58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483071/normal_5faf8dc3d27d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426571/normal_5fad48800302f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470977/normal_5fb976fb30c2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f9ad2c7ac9ec.pdfIn PDF document text
    • https://kokejegifuro.weebly.com/uploads/1/3/4/4/134477846/zabadave_pegise_vidodidupukat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380086/normal_5f9a994545923.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483624/normal_5faacd7cb8e33.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/872b09d0-2ae8-4114-a377-4332554daea7/24648467311.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_off0000d464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD464 5244 bytes
SHA-256: 14fc1d3833b11b314aededa1559de4c2bc51f4afb61d168a54f0fe462f241719
font_01_sfnt_off0000e629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE629 10656 bytes
SHA-256: d618301b3326036bc90422fd6515af41e822f3555f806db718f49a4e54e8b602

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