Malicious PDF — malware analysis report

Static analysis result for SHA-256 c996161f327053f2…

MALICIOUS

PDF

77.1 KB Created: 2021-02-11 12:31:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 6f18bf0c748b518885026ef40872a7ee SHA-1: 4aa35fdcd80de02140a45f5a2db847a5224b85a5 SHA-256: c996161f327053f2204904d8e23b3b35eadea2353fee2d45cfa0c9aac8e0f9f0
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The document body contains garbled text, but the presence of numerous links to disposable hosting and a specific malicious redirector URL strongly suggests a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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
  • 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 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://yafferge.ru/123?utm_term=license+plate+flipper In PDF document text
    • https://cdn-cms.f-static.net/uploads/4472186/normal_601b53618c23c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451348/normal_6008ec40bceb4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413975/normal_5fca5fa38b811.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/hUghFig/92404179108.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386607/normal_5feaf63785787.pdfIn PDF document text
    • http://edaruzal.xyz/fexavowuvituperotokonaxvgk.pdfIn PDF document text
    • https://cdn.sqhk.co/lixozimiz/ejjgi2g/ark_wyvern_taming_tips.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gikipixuvi.rf.gd/the_law_officer_s_pocket_manual_2018.pdfIn PDF document text
    • http://gubilozav.epizy.com/befabixevozusalade.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/tepujoragega.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/live_football_streaming_apps_for_android.pdfIn PDF document text
    • http://kegotetebam.epizy.com/fufegafinuvapib.pdfIn PDF document text
    • http://nubimopupugu.rf.gd/career_aspiration_statement_template.pdfIn PDF document text
    • http://xuvunemomot.epizy.com/troubleshooting_guide_for_blown_film_extrusion.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f28f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28F 4948 bytes
SHA-256: eed90cdc646fa225a01e41e38ed7b2e8916d6f3b90108146ec427eae5b6ebc53
font_01_sfnt_off0001037c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037C 10800 bytes
SHA-256: f7c2cd5e2462a3b49b14e5c022e62167fc4025f69979216b413c9467219f1246

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