Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dfa7e628255f22b…

MALICIOUS

PDF

71.2 KB Created: 2020-12-22 20:19:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d2b865ab9ed86f72c07c3a3d4ed716f6 SHA-1: 6a24d30a7041569951afc1f6fa3845ae1853b35a SHA-256: 2dfa7e628255f22bc07b09edf6df8d63a9433727e7ca110be2a8651913437494
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 identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate an attempt to lead users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/strik?utm_term=lock+screen+wallpaper+android+9 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482012/normal_5fb54877662d5.pdfIn PDF document text
    • https://suxamoka.weebly.com/uploads/1/3/4/8/134876373/desopi.pdfIn PDF document text
    • https://nodifolosorak.weebly.com/uploads/1/3/4/7/134758422/8479bdf220534.pdfIn PDF document text
    • https://mefosenide.weebly.com/uploads/1/3/4/7/134715399/93516192c5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457590/normal_5fc42ab225e02.pdfIn PDF document text
    • https://zogerosolubelu.weebly.com/uploads/1/3/4/5/134576434/f408d82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380680/normal_5f8dc9e67f662.pdfIn PDF document text
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/5d3038e96b3fc.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/441e1a8f-2097-46f6-9577-a372fbce3478/bose_radio_manual_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c19bab79f442f24acc6a/t/5fc7c2253ac9c763f4e44de0/1606926887085/arcade_defender_game.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/everfi_module_7_quiz_answers_quizlet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc06ef3116eb00e3c49974f/t/5fc1cf952dd96f591831b7cc/1606537110370/kufevajizujiduzo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC468 5320 bytes
SHA-256: 429c734e68069f4c0816c2e1a05501b4259cfcb65f83810602765358a4da33c1
font_01_sfnt_off0000d6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A7 10304 bytes
SHA-256: 047e6bd49bee7a60fdda881a24fd8c0ec89df9a743ca43d4e311846b111481c9
font_02_sfnt_off0000fa24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA24 16392 bytes
SHA-256: c9b9d40238817e9fd1c0b290bb100284b8f2d9dcc1188338581b9d27efa8fa30

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