Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b9efc6bab3a8a44…

MALICIOUS

PDF

72.4 KB Created: 2021-02-22 19:19:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a965f60b52c92c40bd360392f1b09aa0 SHA-1: e0bde76747bc0587445c066ae18cd8145cd664ce SHA-256: 6b9efc6bab3a8a4431cf59d50f136025384bf326d665924e46beccaeb1248ce0
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to prayers and recipes, likely serving as a lure to disguise the malicious nature of the embedded links.

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
  • 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.
  • 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/strik?utm_term=oracion+del+sagrado+corazon+de+jesus+padre+pio PDF link annotation
    • https://cdn.sqhk.co/wefenosefob/ieIigPi/firiwazakiwisakotezoxaf.pdfIn PDF document text
    • https://kanelepamub.weebly.com/uploads/1/3/4/1/134132184/8066159.pdfIn PDF document text
    • https://wazolupagod.weebly.com/uploads/1/3/0/7/130775763/famobap.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/jeXiegd/99630994559.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446782/normal_5fce73545888b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450440/normal_5fce898e94c69.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383802/normal_5ffb48252453a.pdfIn PDF document text
    • https://cdn.sqhk.co/xifusajexom/jiijWgd/jejaxoba.pdfIn PDF document text
    • https://robavefozaxun.weebly.com/uploads/1/3/4/3/134379548/lezivutonokenaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/gikunixa/hiapja7/spiritfarer_recipes_collection.pdfIn PDF document text
    • https://peramixirado.weebly.com/uploads/1/3/1/6/131637131/6687015.pdfIn PDF document text
    • https://cdn.sqhk.co/gukawaki/gfoicQK/sing_karaoke_by_smule_pc_download.pdfIn PDF document text
    • http://mexicotop.xyz/como_fazer_para_nao_descascar_a_peleapd9z.pdfIn PDF document text
    • https://munuliwakubife.weebly.com/uploads/1/3/1/6/131637312/lenimexigifi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD2 5396 bytes
SHA-256: d0f39fbd5ed5fe8677429abe2514ab17a626f68b9f8fccebb38643d955d888bb
font_01_sfnt_off0000ee3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3F 11180 bytes
SHA-256: e65761f3e6a2dadd00df4206283d7ce9f088974aa6f1c309bc42e0d1b3b71d37

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