Malicious PDF — malware analysis report

Static analysis result for SHA-256 d08ed2fc6c817e06…

MALICIOUS

PDF

75.0 KB Created: 2021-03-06 08:40:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8883e5242b6196e588cb3c309090c919 SHA-1: 3cca0446ebdb90065fe4e8dcc033cb662f8953a2 SHA-256: d08ed2fc6c817e0678453e37b4db29bd86c6266b9505645834ef634bea5acf11
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to phishing or malware hosting sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lead users to potentially harmful content.

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://pelibifir.ru/award?keyword=is+organic+chem+1+or+2+harder PDF link annotation
    • https://dodoxatufasiw.weebly.com/uploads/1/3/2/6/132681482/mowelovupanetiso.pdfIn PDF document text
    • https://rofunepez.weebly.com/uploads/1/3/2/7/132710772/13a66ae81.pdfIn PDF document text
    • https://xikofekukinakij.weebly.com/uploads/1/3/2/6/132681309/9431195.pdfIn PDF document text
    • https://nixujukasal.weebly.com/uploads/1/3/1/6/131636737/9bbe263f3fe0.pdfIn PDF document text
    • http://mizejodaf.mywebcommunity.org/all_in_1_hdd_docking_875_manual_espaol.pdfIn PDF document text
    • http://vetozadep.mywebcommunity.org/horus_heresy_board_game_1993.pdfIn PDF document text
    • https://pobunusegem.weebly.com/uploads/1/3/4/4/134460984/nedokuduv-dasuri.pdfIn PDF document text
    • http://vojemodipu.sportsontheweb.net/fogebisegosufo.pdfIn PDF document text
    • https://wunamixexot.weebly.com/uploads/1/3/4/4/134456109/jivutizorudutujus.pdfIn PDF document text
    • http://onlineeshop24.xyz/xeruky371j.pdfIn PDF document text
    • https://gifavunebaxagem.weebly.com/uploads/1/3/4/3/134358660/kijiruz_xofeguno.pdfIn PDF document text
    • http://bitsracing.net/50303665408ai2s.pdfIn PDF document text
    • https://tixowofo.weebly.com/uploads/1/3/4/5/134592641/c4aa1b694bc386.pdfIn PDF document text
    • https://penomagara.weebly.com/uploads/1/3/2/6/132695387/wunid.pdfIn PDF document text
    • https://pikupazu.weebly.com/uploads/1/3/4/5/134577858/4039724.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/03f9b925-87fc-4119-9233-76937bf34cd4/chrono_trigger_remake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6c1de93-81ef-4c1d-9ab8-e8a90ef4ed93/what_does_the_communist_manifesto_say.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_off0000ea51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA51 5444 bytes
SHA-256: 3a0b08ef31b0e14e38d89e8e03a701b073f0c5666331a214d8ef93d7932bb365
font_01_sfnt_off0000fcad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAD 10112 bytes
SHA-256: 74af33ea82009fb3a4cd72734ea2810078d05e4d532a3abf1b6ca6024a006ded

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