Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e8b3d1a1798c321…

MALICIOUS

PDF

69.1 KB Created: 2020-11-23 08:36:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50f91409bc29921fd65e765f33104bf3 SHA-1: d1b9d9bce6fe32ba730eea67ac9b79636f99d7cf SHA-256: 9e8b3d1a1798c321f159bc95db63cae5f08d523060bbcd7d0bb331b10b90230f
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, with one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links suggests an attempt to manipulate search engine results or redirect users to potentially harmful content, aligning with phishing or spamming tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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.
  • 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://gettraff.ru/123?utm_term=swtor+5.0+crafting+guide+6.0
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/72ee30a27c6.pdf
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f8e615f34344.pdf
    • https://cdn-cms.f-static.net/uploads/4446283/normal_5fa12663d98cf.pdf
    • https://cdn-cms.f-static.net/uploads/4481420/normal_5fb77dd262fb8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/78032168-352e-4e83-aaf5-833f9938a384/hamilton_beach_flexbrew_instruction_manual.pdf
    • https://s3.amazonaws.com/gixawetopoli/fitted_twin_sheet_size.pdf
    • https://s3.amazonaws.com/lefemijip/mirixadudezupipuluvafan.pdf
    • https://uploads.strikinglycdn.com/files/b49feb2a-a0e2-4afc-adc7-7cac0b172ef9/tv_guide_listings_for_tonight_nashville.pdf
    • https://s3.amazonaws.com/widuxade/rapadi.pdf
    • https://s3.amazonaws.com/firigugixujotov/ramesilifexixi.pdf
    • https://s3.amazonaws.com/mizeteb/joshua_martinez_trader.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_off0000ceed.bin
d82266947904976e297a8d631d795ffb8b1b00e31f243495433caed29dffe28b
pdf-font-stream PDF embedded font (sfnt) at offset 0xCEED 5624 bytes
font_01_sfnt_off0000e243.bin
03ee5516de99674d7fe5b261c19b6cab431ea66cced99cb9619cefd72abb5857
pdf-font-stream PDF embedded font (sfnt) at offset 0xE243 10912 bytes