Malicious PDF — malware analysis report

Static analysis result for SHA-256 8835df05addfa0a9…

MALICIOUS

PDF

67.3 KB Created: 2020-12-17 07:06:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3dc08a9c7e35087ec27c6c1839ab3385 SHA-1: 94438df5f038bff2f1b121d263d6f4b79cc0fcf8 SHA-256: 8835df05addfa0a987d3362462a1f24617171b654cc590523db55690b287cd30
194 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a malicious redirector, specifically designed for phishing or malware distribution. The embedded URL, https://cctraff.ru/123?utm_term=what+level+does+venonat+evolve+in+pokemon+quest, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to a Pokemon game, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://cctraff.ru/123?utm_term=what+level+does+venonat+evolve+in+pokemon+quest In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403560/normal_5f9597c55ee11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489724/normal_5fc1c6adc1fd2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404503/normal_5fd045bb42fca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426820/normal_5fbfd1ee89998.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f873a9d023b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413005/normal_5f975fc32f768.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/accp_chest_anticoagulation_guidelines_2012.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/74179829685.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf57afa97599144eee7878/1606375344173/toyo_proxes_r888r_tire.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/23363627101.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC87B 5368 bytes
SHA-256: 9566c12622e44f942d5a3a37815022740a022a15b8f1b3eade55bdcb033de7e7
font_01_sfnt_off0000daa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA8 11232 bytes
SHA-256: 867da070b5b40eb9546feb4e0a1b9615e9456a7e3387d44a846b7d801c7b4947