Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad6978526d18457…

MALICIOUS

PDF

74.2 KB Created: 2021-03-23 09:14:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c94b8cd35de5cc95335c6c2b2eb93bbc SHA-1: 20311431dd026f867bf1d5aebc7fc334b78674c2 SHA-256: fad6978526d18457896ab4bf9063073ea54aa080ad718244b189c3fd5ee46a65
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous embedded URLs that likely lead to malicious content or phishing sites, disguised as educational material. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://nipisod.ru/strik?utm_term=std+8+maths+textbook+ncert+gujarati+medium PDF link annotation
    • https://cdn.sqhk.co/bujasugawo/b5bIJOy/us_armed_forces_enlisted_rank_insignia.pdfIn PDF document text
    • http://atomlinux.com/60987836138je9wh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460058/normal_6055c1370625e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449630/normal_6022e635c86b1.pdfIn PDF document text
    • http://metaleagle.ru/how_to_use_moho_occupational_therapyagm47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490725/normal_60519400195c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424349/normal_5fcc6201ea858.pdfIn PDF document text
    • https://cdn.sqhk.co/vexedobasof/idDDhhp/mobile_screen_video_recorder_apk_download.pdfIn PDF document text
    • http://copyrighthelpcentral.com/2004_honda_shadow_sabre_1100_gas_tankd0f88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418566/normal_5fc9e11f80cb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426263/normal_5fe97db94bba6.pdfIn PDF document text
    • https://cdn.sqhk.co/fegadosijete/E1Eefii/rofatatufapage.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413987/normal_6028f8a442300.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368997/normal_5fc7906b68caa.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/aF2ligN/weluxevabepadejozuzufemu.pdfIn PDF document text
    • http://50offit.pro/69965933369820np.pdfIn PDF document text
    • https://cdn.sqhk.co/nulusezitelo/heUijd6/lol_zed_combo_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/vusunuvaka/cDidHhe/gifip.pdfIn PDF document text
    • http://deflecfcvy.best/casio_fx-115es_plus_manual24fnq.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_off0000e2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F9 5964 bytes
SHA-256: 8edfccf6ee75a8ddfb9f779bc63ee891d2485238855fc709e92a6bc8eb7b1de0
font_01_sfnt_off0000f71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71C 10476 bytes
SHA-256: 574107ada5415928ed7b09d7a8ad16254dfce8107925b78e85feecaf56143aa2

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