Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c0aa96d6377a07f…

MALICIOUS

PDF

77.1 KB Created: 2021-03-15 13:58:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 73849bab83ae15641a5e8ffc49d1e397 SHA-1: 9392408c31c818696a7dd3e7fb66f3b433a5e380 SHA-256: 4c0aa96d6377a07fda9ad55027d9d8c2e8bc56d4befd423c2f81dafca54455d9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, embedding numerous URLs that likely lead to malicious content or further infection vectors. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the intent is to distribute malware or phish users through a network of disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/award?keyword=similarities+between+angiosperms+and+gymnosperms+pdf PDF link annotation
    • http://tofabukusakuni.22web.org/lagu_alffy_rev_sea_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450638/normal_6013e0c4560e0.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/hatha_yoga_sequence_30_minutes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369919/normal_600753395490a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416671/normal_604b09d5e03a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484363/normal_5fecad579d37c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385862/normal_5fedff4fea114.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/GGGuDjf/58371757520.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370266/normal_5fd8b2a2b3e08.pdfIn PDF document text
    • https://cdn.sqhk.co/lepezusija/aNgfKia/ruxati.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/hambriento_nach.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/seferafafedoponiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383321/normal_6026cbdf58dd6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391314/normal_5fe55e5bcb319.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380072/normal_6031c26e2a391.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496577/normal_5fcb2ce3cd2fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zamutuxagen.epizy.com/movoziwu.pdfIn PDF document text
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_984445cc388c4233ac646921461c0f35.pdf?index=trueIn PDF document text
    • https://146c8b6c-0b46-450b-8ed0-b45f1e2a4974.filesusr.com/ugd/b58d21_ed340b545d784268b401e79e1f8a80fc.pdf?index=trueIn PDF document text
    • http://sokozivale.rf.gd/wiguwirewusotiluwedol.pdfIn PDF document text
    • https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_d909cd0ea13448058a2fbcf4a0530182.pdf?index=trueIn PDF document text
    • https://fea50346-ab34-4b67-843e-90a6383c4983.filesusr.com/ugd/bf678e_aee3cd1a12224e5e854abee9cc33766c.pdf?index=trueIn 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_off0000ee24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE24 5800 bytes
SHA-256: 446939a41555acfc5697223b0855de4f94254479d2baedaa366f2f9877989602
font_01_sfnt_off000101d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D9 10780 bytes
SHA-256: 643bef3dbe7090205687b814894fb92e51f4c0d15046b4b558d8f3f10345d1f7

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