Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddf5b79648eedc7a…

MALICIOUS

PDF

75.6 KB Created: 2021-04-10 13:40:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ecf8beaa91b490c089620c1799912b7 SHA-1: 9001cefa297f3df91b464efc53cba689e940bd08 SHA-256: ddf5b79648eedc7aad2c1e00aa01fea5961c6a02e9a330cb4dcccae99d78a5b1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of a large number of external links, many pointing to PDF files, suggests a link farm or a mechanism for distributing further malicious content. The document body, though heavily corrupted, contains a URL that matches one of the extracted external links, indicating a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=where+is+the+battery+in+2011+dodge+avenger
    • https://cdn.sqhk.co/letonolomo/ftRjijj/paduxulibaninogubogilip.pdf
    • http://starkrobotics.org/luzajasiponerifivitetinavzia63.pdf
    • https://cdn.sqhk.co/bataseset/tGtM4jh/sl_theme_kde_oxygen.pdf
    • http://newyearshop.site/defulagupidetapipunemivumc2zi2.pdf
    • https://kofiserifopame.weebly.com/uploads/1/3/2/7/132741397/sexepunivule.pdf
    • https://cdn.sqhk.co/fafegatoko/bjbjjii/37180996239.pdf
    • https://cdn.sqhk.co/gopuxipo/CYgfjeq/71777187184.pdf
    • https://cdn.sqhk.co/xenaporo/iiYjhgj/13336756453.pdf
    • https://cdn.sqhk.co/munuluxel/gidjcjh/blaze_and_the_monster_machines_season_1_dvd.pdf
    • https://cdn.sqhk.co/nasanoroge/QbPgfeC/58602076225.pdf
    • http://amsidgi.xyz/46408459838ymtmx.pdf
    • http://frukt.fun/equus_peter_shaffer_read_online8cd1s.pdf
    • https://kafolegilu.weebly.com/uploads/1/3/2/3/132303068/67824.pdf
    • https://cdn.sqhk.co/xovijanovupu/fgeiche/teddy_bear_puppet_claw_machine.pdf
    • http://tryraisins.club/love_and_respect_workbook_questionsrw4pt.pdf
    • http://prequester.online/32368982657shgf2.pdf
    • https://ninusava.weebly.com/uploads/1/3/1/4/131436980/6c7aee6.pdf
    • https://cdn.sqhk.co/jedabawefi/yzrSgi3/virtual_dj_software_for_android_tablet_free_download.pdf
    • https://koxowugazetumul.weebly.com/uploads/1/3/6/0/136015765/3608873.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7a3.bin
0f839f51f1210eae0cce43505e62e0134e28d908faa32c25528e25185bd21dc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A3 5696 bytes
font_01_sfnt_off0000fb19.bin
701b185ccdaf7aa4d070bee687d4b8ec4ea5070347e54445983cd5d77326a9ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB19 11180 bytes

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