Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c0ae0bf90358db…

MALICIOUS

PDF

65.4 KB Created: 2021-04-01 19:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6e05105a66fee5cb2dc1f9f9a9f8cf7e SHA-1: fbb6ba77054f68d3039181c810104a65d764c7ff SHA-256: 71c0ae0bf90358db931e99bac8c49c173962d16c51d3623dff23286c96a486b8
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a large number of external links, many pointing to other PDFs hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The primary purpose appears to be directing users to external content, which could be malicious or lead to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8603

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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://pelibifir.ru/award?keyword=anatomy+and+physiology+of+human+body+systems+pdf PDF link annotation
    • https://cdn.sqhk.co/girewobo/KigfB0o/electronic_drum_set_price_olx.pdfIn PDF document text
    • https://cdn.sqhk.co/wamamuli/Ujcgieh/eclub_olive_garden.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/59116599633.pdfIn PDF document text
    • https://mebavowu.weebly.com/uploads/1/3/4/3/134353315/1049163.pdfIn PDF document text
    • https://cdn.sqhk.co/nujidegowupi/whdJhht/tobuwivutajozutiwetarafo.pdfIn PDF document text
    • https://panejukirid.weebly.com/uploads/1/3/1/6/131606092/wivumupiw.pdfIn PDF document text
    • https://jazelisis.weebly.com/uploads/1/3/4/8/134870131/webiboduzekeg-dokepugitibuku-pusit.pdfIn PDF document text
    • http://gallery-shop.site/aws_data_warehouse_architecturero61y.pdfIn PDF document text
    • http://moymagazin.xyz/rotutov23cqr.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/rqmZUhe/74478863558.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/what_does_partner_wod_mean.pdfIn PDF document text
    • https://xozisimoxu.weebly.com/uploads/1/3/1/1/131164350/04513172edf62.pdfIn PDF document text
    • https://xigowobil.weebly.com/uploads/1/3/4/6/134645495/d329d747310c19.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/zenumafoguxijog.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/hjhadYP/zedezijiwomajadifugibar.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/natozo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://246406bc-bb0d-4f29-baed-d8a6153a9543.filesusr.com/ugd/3ddeef_0af1861b384542fe82fe89b8747f8292.pdf?index=trueIn PDF document text
    • https://4f6c49ad-35c2-4e1b-a50e-a4ca4816ee30.filesusr.com/ugd/a28dad_883b8c1b577f4a389f8bed34427387be.pdf?index=trueIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_fdda20d5735a42cbb04a85ed19409c8d.pdf?index=trueIn 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBE 5472 bytes
SHA-256: 05cf67b36bf6b6d057a66fed8bf351f7200b167292cd775dcef8d41c6bf2b02c

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