Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2daa632b8f476cf…

MALICIOUS

PDF

73.6 KB Created: 2021-02-28 22:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 12ac75c928399339f78c3d3b4ce27d92 SHA-1: 4f1a9a9f2b0e6d1ec8569d041f7e74a390d5352c SHA-256: a2daa632b8f476cff276f564b55e972bf061ecaed659dd9151a327b204d70021
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, includes text related to 'Crosley record player sound not working', suggesting a phishing or scam lure. The presence of multiple links on disposable hosting further indicates malicious intent, likely to distribute further malware or phishing content.

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/strik?utm_term=crosley+record+player+sound+not+working In PDF document text
    • http://upgrade4me.com/75012961780z7noi.pdfIn PDF document text
    • http://ranixora.iblogger.org/33338131462.pdfIn PDF document text
    • http://zajowidased.iblogger.org/wordbrain_daily_puzzle_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/nogawevorus/kg0Mpha/fisupefiwukoj.pdfIn PDF document text
    • http://dakujuzoma.22web.org/how_to_pronounce_korean_letters.pdfIn PDF document text
    • http://nosagebuki.22web.org/lol_irelia_guide_s8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383704/normal_5fe0a1349d0ce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wukevuwotud.rf.gd/10191682639.pdfIn PDF document text
    • http://fuluputig.epizy.com/47877598673.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/kugisabemote.pdfIn PDF document text
    • http://rikonobawo.epizy.com/can_you_duplicate_sheets_in_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/feduv.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/20900773513.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_off0000e1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D4 5404 bytes
SHA-256: 2398b6d594719a25c3040236ca2216d1fab0576e217bae7bcbb6f03ce2506508
font_01_sfnt_off0000f461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF461 11024 bytes
SHA-256: b46daa6b6825ee1961f6ec6cb5fb4b93e8a631057b625ff1669a5b438321ea78

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