Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4085fb0f59a012…

MALICIOUS

PDF

76.3 KB Created: 2021-02-28 17:54:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: db99f339f46eb819f9d2100d37c1a358 SHA-1: 3feb0cdec5bfe6ea3e556bf4a3ebb8d17113c8f4 SHA-256: 9c4085fb0f59a0123c9455a0950436b256e7efba1c743868b4f0ce26aad8926d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a common phishing lure, likely leading to a second-stage download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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.
  • 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://ponafet.ru/award?keyword=what+is+knowledge+and+philosophical+foundations+of+social+work+all+about PDF link annotation
    • https://cdn.sqhk.co/zivuwimavez/g89ifij/92841618500.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489598/normal_5ff143dec80c4.pdfIn PDF document text
    • http://italy50wow.pro/auditoria_de_sistemas_operativosl5i5r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417049/normal_5fff5479ad27f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421341/normal_601de335aefd1.pdfIn PDF document text
    • http://crysety.xyz/wolfgang_puck_bread_machine_manualruvcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412897/normal_6034cde1b83ae.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/3ihaEia/quick_hoops_basketball_free.pdfIn PDF document text
    • http://brandframeb.com/35125333532uw4ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408993/normal_5fef6fbfd16d1.pdfIn PDF document text
    • https://cdn.sqhk.co/lelabepena/hF8gdhj/rovuwavosutogapevow.pdfIn PDF document text
    • http://bottlechainworld.com/lelinunupitijunet226w7.pdfIn PDF document text
    • http://guitar.su/laravel_php_framework_tutorial_for_beginnersqn2h8.pdfIn PDF document text
    • http://jokojujut.medianewsonline.com/61805263375.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wififeju.atwebpages.com/94283851076.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/android_studio_version.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34E 5608 bytes
SHA-256: 3509de62723257a47f8b197f3a1fcb48ab276283a6b0736ac738bf6de6283f24
font_01_sfnt_off0000f667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF667 10504 bytes
SHA-256: 578ffd9d164873b8fe69a3f516ac6c6338e5eac4c118314766f664eb7c637f59
font_02_sfnt_off00011a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A56 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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