Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cce647c5d7d91e7…

MALICIOUS

PDF

68.4 KB Created: 2021-02-19 18:29:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 627fcb602ba96d9ce8a2ffb5ebe65da1 SHA-1: 5f7b029edc57231cb194403cf4450ad01b7989c0 SHA-256: 0cce647c5d7d91e7ea7358cd3836549c436a7fbdecaef214693616c567724bf4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://druttle.ru/123?utm_term=discipline+and+punish+the+birth+of+the+prison+quotes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4492281/normal_5fd78963c2bd9.pdfIn PDF document text
    • http://juilopkiretlo.ru/binks_brew_piano_sheet_musicqw60r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469350/normal_6024805e5ae50.pdfIn PDF document text
    • http://golesaluwo.66ghz.com/22627169964.pdfIn PDF document text
    • http://ch-bewertung-2888.xyz/20667112345erz6i.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/btjjgge/solakinelenolovewipi.pdfIn PDF document text
    • http://wersita.fun/ar15_lower_receiver_dimensionsgvbpj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369153/normal_6009f911a3f53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482403/normal_601b3087baf30.pdfIn PDF document text
    • http://zobowodinoto.iblogger.org/astley_high_school_ofsted_report.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421354/normal_5fe408c543fd3.pdfIn PDF document text
    • http://indonesia2health.online/do_magic_bullet_and_nutribullet_cups_interchangeablevt473.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kazaxese.epizy.com/54549127878.pdfIn PDF document text
    • http://tosodesuvivat.epizy.com/donobedepi.pdfIn PDF document text
    • http://sujevulakaginig.rf.gd/ronag.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_off0000ce36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE36 5508 bytes
SHA-256: 51978e0392d63fca0203bacf6f55e0f83b9aa15ad66d8dd4a8f8c22346aa40dd
font_01_sfnt_off0000e0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DF 10344 bytes
SHA-256: 60bd48ab3960cea0288b1799dc53a9ea40e96a877f7a2a3cc9b6e5aba32ec509

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