Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee2f2bec3b375fd0…

MALICIOUS

PDF

66.5 KB Created: 2020-11-23 12:39:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7752349ae4cb81fdf0cbf4771bfab062 SHA-1: 1d677f327da9cb8585d7bade5d9d0fbbe5ea187a SHA-256: ee2f2bec3b375fd020a7a9246bea0b49d2089d267e52855ae660abddf4cb0b44
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on suspicious domains or are part of a link farm, indicating a phishing or malicious redirection attempt. The heuristic PDF_SEO_LINK_FARM firing suggests the document is designed to generate traffic to other sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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://traffset.ru/aws?utm_term=animal+sounds+video+mp4+free
    • https://wesaxewotivaf.weebly.com/uploads/1/3/4/5/134578523/4930918.pdf
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f86f9e3b9cf2.pdf
    • https://cdn-cms.f-static.net/uploads/4367301/normal_5f88363fa7b4e.pdf
    • https://moxuronanupew.weebly.com/uploads/1/3/4/5/134597487/2037554.pdf
    • https://cdn-cms.f-static.net/uploads/4444095/normal_5fa6705999ed5.pdf
    • https://cdn-cms.f-static.net/uploads/4401559/normal_5faffd73327a9.pdf
    • https://cdn-cms.f-static.net/uploads/4410030/normal_5f93c5ea97086.pdf
    • https://cdn-cms.f-static.net/uploads/4377407/normal_5f91801622e4b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cfca27af-1d66-4b9d-9415-aa9b804ee1a3/white_teeth_zadie_smith.pdf
    • https://uploads.strikinglycdn.com/files/484833d1-a948-49d1-8b9e-c38a3b8cc634/zara_tasveer_se_tu_mp3_download.pdf
    • https://uploads.strikinglycdn.com/files/c8b71eac-65e8-45cf-bcae-88ba989a500c/the_cbt_toolbox.pdf
    • https://s3.amazonaws.com/titugome/7386802826.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_off0000c81f.bin
d221854dca1b03f245a22a4012f08c85882895789ac03642124a442073043d68
pdf-font-stream PDF embedded font (sfnt) at offset 0xC81F 5324 bytes
font_01_sfnt_off0000da31.bin
0eab1b9574d6d20104641c7c22782e9b44a2ff0399b8e4cd2044ec3b07b479d4
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA31 10356 bytes