Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeef1ea27f14fde4…

MALICIOUS

PDF

71.8 KB Created: 2021-02-27 10:36:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: b3c4b9c6510f04d728c71c21e49d6cd0 SHA-1: fdf074a4adab1813849a6950e177f7f7516196cc SHA-256: aeef1ea27f14fde4eb3cf1e5e0d9c453d6850c11474d41f5bda8c609d2b6d2d9
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating it is a phishing or scam lure. It contains numerous embedded URLs, many of which point to disposable hosting or known malicious redirectors, suggesting an attempt to lead users to malicious sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics strongly supports this attack pattern.

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/award?keyword=how+to+make+light+brown+by+mixing+colours In PDF document text
    • http://study-english-04.space/chaki_chaki_namak_nikal_video_free5bhuu.pdfIn PDF document text
    • https://cdn.sqhk.co/letopoto/hghezhh/47127963248.pdfIn PDF document text
    • https://cdn.sqhk.co/dunafafaxen/20gdjd3/xefenasobajoliveremadab.pdfIn PDF document text
    • https://punujagenak.weebly.com/uploads/1/3/0/7/130775029/7c157.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/fgjhf8x/86529824206.pdfIn PDF document text
    • https://retotitinikuj.weebly.com/uploads/1/3/4/3/134349113/76f3ead7ed1.pdfIn PDF document text
    • http://aydym.club/mukelugibafonaaor14.pdfIn PDF document text
    • http://babarogumo.iblogger.org/chemdraw_professional_16._0.pdfIn PDF document text
    • http://vereffka.xyz/1055262832m903b.pdfIn PDF document text
    • https://gazezujebek.weebly.com/uploads/1/3/4/8/134881616/5644390.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dulaxidej.epizy.com/risk_of_rain_2_character_unlock_guide.pdfIn PDF document text
    • http://disiroto.epizy.com/81507691053.pdfIn PDF document text
    • http://sijuzoratimi.epizy.com/modern_islamic_political_thought_hamid_enayat.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/xafijakotox.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/lonegulavilevaritu.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/dark_souls_2_curved_nil_greatsword_infusion.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_off0000dc49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC49 5640 bytes
SHA-256: 37fe3192981ec592d66474701206f46a8a036fb3ed19ca502f1b665902711e7a
font_01_sfnt_off0000ef68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF68 10208 bytes
SHA-256: 854c8e7071510b9eb6da47882f25f8f39d33e373828b10368ed078c524992a61

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