Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b8324cf3f17c7d…

MALICIOUS

PDF

79.3 KB Created: 2021-02-18 10:27:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 5b5f3685064826cf9bda59c8b30724b1 SHA-1: 0f76193859b85466c56dadb55c06a501d8a0bb6d SHA-256: 86b8324cf3f17c7df501a8ad5eeaa3aa94d6bd291b0503a16752f939e6405971
136 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a high-severity ML classifier and ClamAV detection for phishing. The PDF contains an embedded URI and an image lure that redirects to the URL https://jottigo.ru/strik?utm_term=what+computer+system+analyst+job+description, which is indicative of a phishing attempt. The document body is heavily obfuscated and truncated, preventing a detailed analysis of its specific content or embedded scripts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://jottigo.ru/strik?utm_term=what+computer+system+analyst+job+description PDF link annotation
    • https://cdn.sqhk.co/fenazijeguk/ebuZgfu/fishing_expedition_meaning_in_tamil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406473/normal_5fe00ab5dc9d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369930/normal_5fe3201874390.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447888/normal_600fca7b23fbd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444622/normal_5ff831889aeb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490133/normal_60105f996d733.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449968/normal_5fea2cd5517f5.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/wurajanusapoxefizinituriwmjias.pdfIn PDF document text
    • https://cdn.sqhk.co/bupedamarib/jiBhjd1/56446576352.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/rodigapigeta/altair_hyperworks_student_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/low_fat_low_sugar_diet_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/game_offline_2019_android_terbaik.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_off0000f908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF908 5644 bytes
SHA-256: 6e3dc5960ee4056d79309d420191e37501379447a2cc80cc69e965b0f5fc8e7e
font_01_sfnt_off00010c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1A 10632 bytes
SHA-256: 811fd0e7ccce40f7651caf950d11b5da05f90d78e977c3f3955f7b1e17b66084