Malicious PDF — malware analysis report

Static analysis result for SHA-256 afaa25cf529429a2…

MALICIOUS

PDF

79.3 KB Created: 2021-02-19 19:42:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 326e1e424abed64743d0426c324fbac7 SHA-1: 33fbaea2d136d0fd838af757c8d2b147168e0ae5 SHA-256: afaa25cf529429a257ca44488e497147a59e83e87ccac9ef73a94c81b288d686
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable hosting or known malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The document body is heavily obfuscated and appears to be junk data, further supporting the malicious nature of the PDF.

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://yafferge.ru/strik?utm_term=the+kid+who+ran+for+president+2 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4446162/normal_5ffef51ef0f9b.pdfIn PDF document text
    • https://gituwelogasof.weebly.com/uploads/1/3/2/8/132814340/xikute_situkezepiv_guzuwekeba.pdfIn PDF document text
    • https://kagebavewijove.weebly.com/uploads/1/3/0/7/130740568/c7a64e7c9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405185/normal_601831b8c418c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480397/normal_5fe8d4df8d447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471960/normal_5fd259e671da0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457592/normal_6027301e7e372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369772/normal_5fd8878ad72ca.pdfIn PDF document text
    • https://cdn.sqhk.co/jisepozidis/jsehhgc/idle_tuber_empire_mod_apk_1._0._40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449998/normal_6027f6929aff0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473035/normal_5ff64ddccdfd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379839/normal_602e26a18f487.pdfIn PDF document text
    • https://cdn.sqhk.co/kumotuxijufu/ahciaQc/94935446838.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wodasakuzetu.rf.gd/tetuxibame.pdfIn PDF document text
    • http://zijomofi.epizy.com/xamuvejatoxi.pdfIn PDF document text
    • http://wotujemun.rf.gd/39420387140.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_off0000f7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A5 5336 bytes
SHA-256: c56556d3185ac9bcec6570b78381e839e47bd47f2205026829ebe72ab49d4a91
font_01_sfnt_off000109dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DC 11372 bytes
SHA-256: 55ad1dffe483c3329c00b06a46be8839fe949ef27a7f1dcf7efedd7c741af911

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