Malicious PDF — malware analysis report

Static analysis result for SHA-256 79524b129e6e65a6…

MALICIOUS

PDF

81.8 KB Created: 2020-11-25 10:49:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d54959b84ab304472cb90bd8af61752b SHA-1: 160b644871c48d0ce367c2e7bf4d33804bba7c24 SHA-256: 79524b129e6e65a6c01850443e493d4fbc4914005a274dfd5afc4095ec7da8c1
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'https://traffmen.ru/strik?utm_term=mesa+dual+rectifier+manual' is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/strik?utm_term=mesa+dual+rectifier+manual
    • https://tesekagaz.weebly.com/uploads/1/3/4/3/134342497/1b4bf9e40b8.pdf
    • https://fepaxumezo.weebly.com/uploads/1/3/4/3/134320712/db35ac51d1ac.pdf
    • https://cdn-cms.f-static.net/uploads/4406793/normal_5f9daaf66e3eb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xunilukegez/mergers_and_acquisitions_in_india.pdf
    • https://s3.amazonaws.com/suzitivasekoga/51002770820.pdf
    • https://uploads.strikinglycdn.com/files/3c6c2b82-cc2c-429b-8cee-1c51d67f53a9/lifunikupipemi.pdf
    • https://uploads.strikinglycdn.com/files/6e7adfc9-0e7a-4db7-af46-1b895ddecbbe/sapisufolebagum.pdf
    • https://s3.amazonaws.com/tixedujegibex/asp_gel_polish_removal.pdf
    • https://uploads.strikinglycdn.com/files/bd492785-15d9-49cb-8e50-ff6ad6aa1ccc/way_back_into_love_mp3.pdf
    • https://s3.amazonaws.com/rujimidujek/89084588752.pdf
    • https://uploads.strikinglycdn.com/files/f816596f-66a5-404d-8529-9d64f563b829/xewawexodokovitujo.pdf
    • https://uploads.strikinglycdn.com/files/7e9e9eb1-25fd-42c5-9772-ea035d4614ce/30793514553.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fded.bin
1a7913c491c0b03793fc3d8ba1a6d7b6e8a367daf62a050992b5dcb9d21b23f5
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDED 5172 bytes
font_01_sfnt_off00010f7b.bin
a209da682ee44f220b124638612520d37196087dd6990cbdd2c0cc29fc435a01
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F7B 12452 bytes