Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f66d844ebacea8…

MALICIOUS

PDF

67.3 KB Created: 2020-11-13 20:55:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-01
MD5: 8b0778dca002ea7404a9c1395e6af81a SHA-1: b8f20762cb0bc3c964b20a5d4390e19189f3dc36 SHA-256: a4f66d844ebacea8993af7f53d0384f486cbc9bc4789514b63c77f93f35af3c5
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=food+and+digestion+worksheets+for+class+4 In PDF document text
    • https://poxuxeket.weebly.com/uploads/1/3/3/9/133997588/16cdb372b.pdfIn PDF document text
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/e8631.pdfIn PDF document text
    • https://zodebosamu.weebly.com/uploads/1/3/4/4/134444592/9808ad237b.pdfIn PDF document text
    • https://gakupimofol.weebly.com/uploads/1/3/4/5/134583622/4125052.pdfIn PDF document text
    • https://batatifenosi.weebly.com/uploads/1/3/4/5/134513642/1764265.pdfIn PDF document text
    • https://dodivimibo.weebly.com/uploads/1/3/4/3/134305777/8085226.pdfIn PDF document text
    • https://xovonugobo.weebly.com/uploads/1/3/4/6/134688771/barogenuj.pdfIn PDF document text
    • https://gimelasu.weebly.com/uploads/1/3/4/5/134513778/susiwifug_farefiru.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000c92c.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000c92c.bin)
    • https://uploads.strikinglycdn.com/files/9867613d-7bbf-47b1-a85f-84039bcb1302/exercicios_sobre_converso_de_temperatura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15232749-2fbd-484a-b008-1bb2569be779/magic_fluids_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/lakeland272_family_access.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30b0a0af-e7a1-48d2-8baf-f25e8446c84f/79569859863.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/capello_clock_radio_manual_cr60.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 extracted file (font_00_sfnt_off0000c92c.bin)

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_off0000c92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC92C 5484 bytes
SHA-256: 9d15e12ec164e64b53a2a0608e9b60bdcbd7fdb2fb3b8575fe9b2b3d1fdfff9c
font_01_sfnt_off0000dbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEE 10760 bytes
SHA-256: e7374b68761096617a00e72245c4ac9bf7bb983f3543d4bdfead333fcc9842b6

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