Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce964a787f2f88ae…

MALICIOUS

PDF

64.5 KB Created: 2020-11-23 13:42:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 07ac4d3071fec3a2db77aab5fd23f697 SHA-1: 203bfe6dc03da8be99161d5533ac4965bdf72cae SHA-256: ce964a787f2f88ae372489868275dd00aea79d1daeeeb3b5ec44e0eadcc18d9b
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-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://trafficel.ru/strik?utm_term=pci+gdihook5+driver+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387421/normal_5f916f6d8bd04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457332/normal_5fa93665dff46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393358/normal_5f9f3d2419980.pdfIn PDF document text
    • https://mulovepo.weebly.com/uploads/1/3/4/6/134666579/4882af65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393502/normal_5faf8fc68de38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5fa8aeb6372d1.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/lafomu-fowesutom-dabikituduxun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403127/normal_5f93a012c8375.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/7a5b6cf8-64a0-42f0-8695-a30c2647035d/jujavig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5995cc2-cf1a-44c6-9134-c1e5b4900a5a/lukobejofunagarad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc32dbc2-d022-46d2-864a-3e5d7af838a1/53518026392.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_off0000c048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC048 5364 bytes
SHA-256: d6131b4cb0d421d36712d11d6b69a14b0681f221b95647929ab89be6f30f8354
font_01_sfnt_off0000d29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29B 10296 bytes
SHA-256: 0713ae533d72dc715b3f7149fef92ccca3811d5106cd5aae038fbe4e61289e39

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