Malicious PDF — malware analysis report

Static analysis result for SHA-256 96039b7c75033b28…

MALICIOUS

PDF

61.8 KB Created: 2020-11-21 18:41:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4dfa3563803cc538c7acbe382b445d28 SHA-1: 71a9ede15105cb3652a2c237e80a7d164f928058 SHA-256: 96039b7c75033b28e34c3febb3dd60c489b49d39dac5185b891c7e108aa847b3
214 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, with one identified as a malicious redirector. The embedded content, though heavily obfuscated, suggests an attempt to disguise malicious links as search results for popular media. The presence of a malicious redirector and a large number of external links indicates a phishing or content-scraping campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffmen.ru/wb?keyword=bhairava%20geetha%20movie%20naa%20songs
    • https://cdn-cms.f-static.net/uploads/4373240/normal_5fa9a86d66e9b.pdf
    • https://cdn-cms.f-static.net/uploads/4384839/normal_5f9acb397b151.pdf
    • https://cdn-cms.f-static.net/uploads/4375885/normal_5f8a2d0e81be7.pdf
    • https://wamebadafexu.weebly.com/uploads/1/3/4/0/134040762/wovaber.pdf
    • https://gofobodobade.weebly.com/uploads/1/3/4/4/134444694/puwetodirosaw.pdf
    • https://cdn-cms.f-static.net/uploads/4450037/normal_5fb2b4601dfc1.pdf
    • https://dofedexakupular.weebly.com/uploads/1/3/4/3/134317333/2037774.pdf
    • https://cdn-cms.f-static.net/uploads/4418796/normal_5fa6ff9d00252.pdf
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f8fd98fe81bf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tobito/silufimuxobetasoxu.pdf
    • https://s3.amazonaws.com/tedowafomaru/94310134588.pdf
    • https://uploads.strikinglycdn.com/files/9a973019-17eb-4e46-93fd-9ab1d031be8f/90836105146.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_off0000b34f.bin
b4e766faf3d5787c58b58d95b1f9ae2aa3997ed975feac4333d0d7da432a24d3
pdf-font-stream PDF embedded font (sfnt) at offset 0xB34F 5176 bytes
font_01_sfnt_off0000c4c8.bin
d7c14bb98b5640abce4a130a0a01279bd764da7e0a0ae77fffe1ab38eb70acdf
pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C8 10744 bytes