Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06c28ea8a4a3410…

MALICIOUS

PDF

65.3 KB Created: 2020-11-09 19:56:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 146c746e2d298c1c1a83a012514cdeb0 SHA-1: 29a272c4984cd4989bb37950221501e286a1bbfd SHA-256: e06c28ea8a4a3410507b93f5df9a8c66c186750bc6fed604d83b8a17a20c0465
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?keyword=the+skin+fic+dan+and+phil PDF link annotation
    • https://fomukudir.weebly.com/uploads/1/3/4/4/134403856/tubapam.pdfIn PDF document text
    • https://kudojazejugir.weebly.com/uploads/1/3/4/3/134322101/a4d660d1096d5.pdfIn PDF document text
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/xowasu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f9ec52b14a8a.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/7379816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471109/normal_5fa40709d7728.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f9c1fd0802b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459318/normal_5fa2181dc3ae0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417205/normal_5f99de9d2e20e.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/5ba1c12d-ad8e-42e9-a512-f50ab589ae9a/case_files_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18e89545-d605-4223-a52f-49a7560e6bd4/60827767149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/996fd439-56f1-4684-bad8-507e10cf3e85/xopafeborobipotenamekepig.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/angry_birds_epic_hack_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c5c77c7-e39c-4f2c-a829-83b7f52794ec/pour_que_nos_coeurs_partition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50d240b3-00ef-451a-9694-15544864092a/64062663995.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_off0000c296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC296 5160 bytes
SHA-256: a05771ebc61f8171baabe5d75062cb29e610074c69f6a05fb593963af96ab156
font_01_sfnt_off0000d428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD428 10652 bytes
SHA-256: 96c11c01e354bce2241c297a804ac2b43dc0b67afb8ca876a86d3c535fe020d7

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