Malicious PDF — malware analysis report

Static analysis result for SHA-256 4699f766e92da0dc…

MALICIOUS

PDF

68.6 KB Created: 2021-01-10 10:51:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 293259d3fb96c3be2f70017e5410e184 SHA-1: 581d94b72b66108637f5cab70d7aa0e02488ae96 SHA-256: 4699f766e92da0dc9c0ccb4a2d3453153d49d7dad68a92e7ac1aa782cfaabaf7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of external URLs and the nature of the heuristics suggest it may attempt to redirect users to malicious sites or download further payloads.

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://trafffi.ru/123?utm_term=langley+whidbey+island+things+to+do PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376098/normal_5fd64db39f4cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451970/normal_5fbcc8ee6408a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481065/normal_5fb77cebe235b.pdfIn PDF document text
    • https://site-1168357.mozfiles.com/files/1168357/barbie_magical_fashion_mod_apk_download.pdfIn PDF document text
    • https://site-1230768.mozfiles.com/files/1230768/sbi_clerk_prelims_result_2019_ibps_guide.pdfIn PDF document text
    • https://pilitopamazi.weebly.com/uploads/1/3/4/3/134313639/223b41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426407/normal_5fc4f90fb45e5.pdfIn PDF document text
    • https://cdn.sqhk.co/vopovaroxamo/ichdhbU/gatifafogegaziwaf.pdfIn PDF document text
    • https://cdn.sqhk.co/sifolilo/Sjggijf/magixomararobabavegojolo.pdfIn PDF document text
    • https://cdn.sqhk.co/jenojigise/hEgjmDB/warhammer_quest_ios_characters.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502698/normal_5fecc3b179c9e.pdfIn PDF document text
    • https://kaxogirigajel.weebly.com/uploads/1/3/4/6/134611066/f60f80c0.pdfIn PDF document text
    • https://cdn.sqhk.co/pemiduwegam/4jjijlD/monster_truck_hero.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cf00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF00 5264 bytes
SHA-256: 6e66c8fee5dceb299fb09fa079c3d07c0ad1f40b21c1bb97bc2394e64f300d42
font_01_sfnt_off0000e0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FD 10880 bytes
SHA-256: d617f74517495d70d17e08ec82b1e6b4138f6c7ae1a4fc08070a38fc32660b34

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