Malicious PDF — malware analysis report

Static analysis result for SHA-256 b318ef9e716a4bc1…

MALICIOUS

PDF

80.2 KB Created: 2021-02-08 19:44:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: c3636f44d3fb267596c0f532fdc7c812 SHA-1: 09b46691b79d30ca8147fd2b6d3343b9710a52bf SHA-256: b318ef9e716a4bc18e7bac7d6ae5acd078421d5305b9a6d07106f7f127effce1
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains and employing UTM parameters, indicative of a phishing or scam lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a link farm designed to redirect users. While no scripts were explicitly extracted, the presence of external URIs and the ML classifier's high confidence score point towards malicious intent, likely to redirect users to malicious sites for further exploitation.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://bologen.ru/123?utm_term=a+christmas+carol+script+free PDF link annotation
    • https://duvozogol.weebly.com/uploads/1/3/5/3/135314926/2874c4c.pdfIn PDF document text
    • http://demask.space/29549130539gwz9e.pdfIn PDF document text
    • https://fazugiwe.weebly.com/uploads/1/3/4/0/134012697/835c0c0cb.pdfIn PDF document text
    • https://tizizuner.weebly.com/uploads/1/3/1/8/131872037/xejimiroko.pdfIn PDF document text
    • http://nigasheff.xyz/paint_tool_sai_1.2.5_full_downloadtlv0x.pdfIn PDF document text
    • http://youralteragoods.com/pdf_to_word_mac_os_xjsanb.pdfIn PDF document text
    • http://gexafozo.22web.org/wukanaju.pdfIn PDF document text
    • http://allrecipes.pro/19443090975n45ty.pdfIn PDF document text
    • http://blablablacar.online/bangalore_days_dulquar_salman_ringtone5yq17.pdfIn PDF document text
    • https://vizodifoberesin.weebly.com/uploads/1/3/4/9/134900429/4a6eef282ea92.pdfIn PDF document text
    • https://ruwezowoja.weebly.com/uploads/1/3/0/7/130776808/7818061.pdfIn PDF document text
    • https://pelosewedi.weebly.com/uploads/1/3/4/7/134753512/jujaxosuril-zopoperimove.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kofufinaniba.rf.gd/89706968602.pdfIn PDF document text
    • http://tuwesexo.epizy.com/57009307921.pdfIn PDF document text
    • http://kunimaz.rf.gd/pirukarazubelagalosogaji.pdfIn PDF document text
    • http://xapimiwosusuv.epizy.com/20567393466.pdfIn PDF document text
    • http://zipoxibel.epizy.com/tamuxigaz.pdfIn PDF document text
    • http://gefafeduvul.epizy.com/70869111178.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_off0000ffed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFED 5244 bytes
SHA-256: 5e0ba39bb7a4d6d8dce8ac59824c893c9c0e165faf2daa4364d84e249ac62be8
font_01_sfnt_off00011196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11196 9992 bytes
SHA-256: a845dd53be98d8a7c60de784b46eb926ac799e7506a739a90996225a58681f1a

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