Malicious PDF — malware analysis report

Static analysis result for SHA-256 468e2775438552fb…

MALICIOUS

PDF

73.7 KB Created: 2021-01-08 16:17:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb84964fffa15b9fee2a391eb77ef1da SHA-1: b732b62ef6ffeea39b14310771871792e2489643 SHA-256: 468e2775438552fba342e631ade44193ee5656b1abc1e2b7e12ebe1c6ccbe509
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a "PDF_SEO_LINK_FARM" heuristic, pointing to various PDF files hosted on different domains. One prominent URL, "https://traffnew.ru/aws?utm_term=javadoc+syntax+cheat+sheet", is embedded within the document's text and appears to be a lure. ClamAV detection as "Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0" and a high ML classifier score further indicate malicious intent, likely related to phishing or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/aws?utm_term=javadoc+syntax+cheat+sheet
    • https://cdn-cms.f-static.net/uploads/4382629/normal_5f8fd44b337e3.pdf
    • https://static.s123-cdn-static.com/uploads/4416319/normal_5feb5c25d7cfe.pdf
    • https://cdn.sqhk.co/fujalapevame/bDZyhaU/51634990847.pdf
    • https://cdn.sqhk.co/tavikebepo/hjhjiXy/bemimuvasa.pdf
    • https://static.s123-cdn-static.com/uploads/4416792/normal_5fe121411ccc1.pdf
    • https://static.s123-cdn-static.com/uploads/4369486/normal_5fc7128eddd87.pdf
    • https://cdn.sqhk.co/fulaxanew/nhaihlo/brand_management_colleges_in_canada.pdf
    • https://tugojomabam.weebly.com/uploads/1/3/4/5/134588125/jopuwutosugigigavami.pdf
    • https://nitaluba.weebly.com/uploads/1/3/4/3/134348735/9537643.pdf
    • https://static.s123-cdn-static.com/uploads/4427076/normal_5fc570868d6a9.pdf
    • https://pidivupam.weebly.com/uploads/1/3/4/3/134327465/6c9c99afa.pdf
    • https://cdn-cms.f-static.net/uploads/4381318/normal_5fa511ee39b91.pdf
    • https://robavefozaxun.weebly.com/uploads/1/3/4/3/134379548/zorud_wesusepatu_dobudebetepajek_jerir.pdf
    • https://cdn.sqhk.co/gasubapo/jhjYJuO/wezuwizufejiwegi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000dfff.bin
a974e9da403735e1c685a3a8dc69f1ac8b2c6dfed8228da29600abc7e70d2558
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFF 5120 bytes
font_01_sfnt_off0000f179.bin
236a7f534ac722a2c56fa9ccbb9852c90792011390352c4f5f3c863b92cf2d7d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF179 12372 bytes