Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5f9b1e88b2e9887…

MALICIOUS

PDF

133.8 KB Created: 2020-12-31 17:19:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 2e6ced0d230bd76bec191a8f5dc391fd SHA-1: f0dc813ab43cfefc0b3ca7c8d303712c1892d460 SHA-256: d5f9b1e88b2e9887f27bcc6c3053fc153688e86d6e7a815ca6264cd19d96f965
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating it's a phishing lure, specifically using an SEO redirector with a "free download" theme. The embedded URL and ClamAV detection further support its malicious nature. While no scripts were directly extracted, the PDF structure and URL suggest it's designed to redirect users to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9811

Heuristics 6

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/strik?utm_term=snes+roms+free PDF link annotation
    • https://wosufibataba.weebly.com/uploads/1/3/4/8/134866098/4813892.pdfIn PDF document text
    • https://vugogirofezufus.weebly.com/uploads/1/3/4/3/134355312/3394169.pdfIn PDF document text
    • https://pepomujotopulog.weebly.com/uploads/1/3/4/8/134873529/butefifarexon.pdfIn PDF document text
    • https://wusinetowaje.weebly.com/uploads/1/3/4/4/134471696/7354408.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/N7D1Oij/bombay_hair_curler.pdfIn PDF document text
    • https://cdn.sqhk.co/rijakobebux/gRigbgf/15213241918.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/murudute/philadelphia_76ers_reporter_twitter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/580b09fe-7875-4126-8dfe-c6661fdd84a3/deregoxipodedulixuroluf.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/nidawedisoditunosomu.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
    • https://s3.amazonaws.com/zonebon/nidawedisoditunoIn macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d4e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D4E1 4776 bytes
SHA-256: 487cd11863644d7521125cf5c0d58cea8c5596639eb19a1a87caa94dc1fc6168
font_01_sfnt_off0001e508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E508 11156 bytes
SHA-256: ba66a8a1a095b2f015910dca5008eb2ebf1ea4303498a56ebee1d5bc8c53e604

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