Malicious PDF — malware analysis report

Static analysis result for SHA-256 88fc74be4980c93e…

MALICIOUS

PDF

72.6 KB Created: 2021-04-01 07:13:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ba1c7935aa3eebd4d0d2ad2edba0117f SHA-1: 567175a5efe3abcd1363da1eb1934ab31f4d9555 SHA-256: 88fc74be4980c93ed6942bfc1ce8b80ab776368a6258175a1366ba32c2a20d08
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged as a link farm. Heuristics indicate it's a phishing lure, with one URL specifically mentioning 'pdf britannica encyclopedia free download'. ClamAV detection and ML classification further confirm its malicious nature, likely serving as a lure to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jumiwimov.ru/award?keyword=pdf+britannica+encyclopedia+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496170/normal_60646eab47adc.pdfIn PDF document text
    • https://cdn.sqhk.co/balapakufogo/gb9iaMt/jexuvujejurabo.pdfIn PDF document text
    • https://cdn.sqhk.co/pobusafi/cRHI9ic/battle_tank_1990.pdfIn PDF document text
    • https://cdn.sqhk.co/wojinagimepu/ihiaBEK/kavokitaro.pdfIn PDF document text
    • https://cdn.sqhk.co/xodakebebit/ijHjhLN/cross_wallpaper_for_iphone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388405/normal_6036716678bc4.pdfIn PDF document text
    • https://cdn.sqhk.co/mogowepuw/sgelgfp/46895675602.pdfIn PDF document text
    • http://effektzhizni.ru/12733411266fic1z.pdfIn PDF document text
    • http://linza.media/33809999468d9317.pdfIn PDF document text
    • http://nigma24invest.online/18338327541djir8.pdfIn PDF document text
    • http://detonicufficiale.website/xebukesuzedezverhn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451950/normal_5fe35e5e28aee.pdfIn PDF document text
    • https://cdn.sqhk.co/toxaxiked/aigg0hj/tajijodonivax.pdfIn PDF document text
    • http://telgrm.site/vomoxoxxrxt.pdfIn PDF document text
    • https://cdn.sqhk.co/nafolekuge/Pieic30/gavodisojaxiva.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491152/normal_6005f3dbb3b9c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384144/normal_5ff75f8aa6890.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454822/normal_603ef9ce152da.pdfIn PDF document text
    • http://the-english-temple.com/solid_principles_android0r85k.pdfIn PDF document text
    • http://otomail.business/outline_map_of_africaqvqfq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450878/normal_6047476576cc3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000db32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB32 5308 bytes
SHA-256: de5702710ef84c5bf06e834b01420a71d1f50ef01a918ef1a01c4ca23e4a9138
font_01_sfnt_off0000ed62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED62 12056 bytes
SHA-256: 500320be9565c38b222497428d19da81ce941301c8a35fbdc11735e0944a8503

Open this report in the interactive analyzer, or submit your own file for analysis.