Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a90013b407cf736…

MALICIOUS

PDF

88.9 KB Created: 2021-02-26 15:41:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b81701dd54ab661ec70a6f48e89830ad SHA-1: 7523835db5eeb0423d0d444f08429fa1b2feedc9 SHA-256: 5a90013b407cf7366067339c5a8d6bae181bdae4ff1f13087b624c38e270f3ef
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating it contains an external URI and an SEO redirector link. The embedded URL points to 'https://lozipotod.ru/strik?utm_term=hp+elitedesk+800+g1+power+supply+upgrade', which is likely used for phishing or to serve a second-stage payload. The document body, though heavily obfuscated, suggests a lure related to hardware upgrades.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/strik?utm_term=hp+elitedesk+800+g1+power+supply+upgrade PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486745/normal_5ff5e0a0a1807.pdfIn PDF document text
    • https://cdn.sqhk.co/dojatejij/JAb0ahi/dafajuxuxuberafudoxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393752/normal_5fe9ed04ea4d2.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/gege5hf/logo_quiz_level_214.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/norcold_rv_refrigerator_problems_solutions.pdfIn PDF document text
    • https://cdn.sqhk.co/sovajepuxe/i8YUktD/ice_cream_cake_delivery_chicago.pdfIn PDF document text
    • https://cdn.sqhk.co/bogovureg/dfZvkyl/pilot_flying_j_jobs_altoona_iowa.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/dwjsqjf/51837366221.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487423/normal_60271ea2e2f51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483361/normal_602d82a781a95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472484/normal_5fdf0e8177d1f.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/39592132907.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vujapoguxesak.myartsonline.com/was_the_3rd_estate_started_french_revolution_and_wrote_1st_constitution.pdfIn PDF document text
    • http://ropajevunowijit.epizy.com/73202743451.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB4 5732 bytes
SHA-256: 12f76041bf7077c2f0aeac92b0ec1ce22a35d88ad7b0a5b9bbc7240e73f12892
font_01_sfnt_off00012e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E65 11792 bytes
SHA-256: fe21d1ed8d78804d37899a555acbbddc758fdb8759403a9bd2781754022cc629

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