Malicious PDF — malware analysis report

Static analysis result for SHA-256 b793978c539f9763…

MALICIOUS

PDF

89.3 KB Created: 2021-03-17 05:56:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2e2f228f7fe9e3e079ad7976df83b41a SHA-1: 40ace08582105384bbf777bc57126040ec509a94 SHA-256: b793978c539f97634e182de0c4bed423a83bfb823f1597120cd6279405f41b7e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URL that points to a link farm on disposable hosting, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect the user to malicious content.

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
  • 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://nipisod.ru/award?keyword=ccna+voice+notes+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420030/normal_6022be828e8a6.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/cancer_information_booklets.pdfIn PDF document text
    • http://xagowawusik.66ghz.com/82187032167.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475727/normal_5fefc0eeb6430.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487663/normal_604d7f021c5b4.pdfIn PDF document text
    • http://kadaxejob.mypressonline.com/llamadas_telefnicas_roberto_bolao_completo.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/3d_games_java_320x240.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sofidubanelen.epizy.com/aamir_khan_dangal_movie.pdfIn PDF document text
    • http://jewomegoka.epizy.com/7th_grade_math_vocabulary.pdfIn PDF document text
    • http://nopugorib.onlinewebshop.net/7599519591.pdfIn PDF document text
    • http://fopagozijudiri.epizy.com/maplestory_2_mobile.pdfIn PDF document text
    • http://liwubujuwu.epizy.com/aviation_safety_newsletter_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/877c1e48-892c-4f34-948a-3c4d9f5bc239/ford_4_speed_automatic_transmission_identification.pdfIn PDF document text
    • http://kugesiv.epizy.com/washington_state_university_address_for_taxes.pdfIn PDF document text
    • http://vepunip.rf.gd/latihan_bahasa_arab_tahun_1.pdfIn PDF document text
    • http://bopisumeku.atwebpages.com/rulasemoredub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24a73133-a2a9-45e5-87ef-a1a450efd01b/why_does_my_dyson_dc34_keeps_cutting_out.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 4

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_off00011d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8C 4988 bytes
SHA-256: 9e9578f92a5891c15442b94965eb07d4e20682b273bec90fb7dd2b07914eba58
font_01_sfnt_off00012ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA2 12468 bytes
SHA-256: cf415a063df04645f5578c1f93f30bc72d60f6bd96215229e3c480acc438892d

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