Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cb99e72bd09afbd…

MALICIOUS

PDF

74.1 KB Created: 2021-02-27 14:00:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: c806a50f6340f1f9cd7fb0d014ecaf0e SHA-1: ce4ee7f9e2e9c365d609270969e3ad7efb772d1a SHA-256: 2cb99e72bd09afbd694eba33b39c1f1e3f6ac553eec49fd6c589a6cdfaf0a32b
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, with one specifically pointing to a marketing-related keyword on a suspicious domain. Heuristics indicate the PDF is a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a malicious site or download further payloads.

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://jumiwimov.ru/award?keyword=marketing+management+by+philip+kotler+ppt+chapter+1 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446158/normal_6004dfaf9a7b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_60138718878a2.pdfIn PDF document text
    • http://pornbustyvids.com/history_of_ashanti_kingdomq9g6b.pdfIn PDF document text
    • http://1-bog.ru/doomsday_last_shelter_guide7sbe5.pdfIn PDF document text
    • https://weranatowo.weebly.com/uploads/1/3/1/4/131408071/c6ae602072131d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419424/normal_602f7c368f27a.pdfIn PDF document text
    • http://floradoma.net/stickman_and_shotgun_302mn7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409092/normal_5fc9332c7afdb.pdfIn PDF document text
    • http://ipai.online/a_night_in_compton_moviecewpv.pdfIn PDF document text
    • http://vuzetasavuxoso.mygamesonline.org/dead_until_dark_characters.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481423/normal_6009b0a4f335a.pdfIn PDF document text
    • https://bugupomulu.weebly.com/uploads/1/3/5/3/135396692/lafikurikezukoz_nudolid_farubog_fonidinawon.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE361 5532 bytes
SHA-256: faab48ab1e39a5ca15e22d28ac2a84a8ab55934699f3d959dd6716580e33773e
font_01_sfnt_off0000f628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF628 10860 bytes
SHA-256: 93c1fc776b640856857d5f3c023b7fb2f15a5fc10a349cf3f7d3b72f230f61c4

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