Malicious PDF — malware analysis report

Static analysis result for SHA-256 794336c14b8e0a07…

MALICIOUS

PDF

76.5 KB Created: 2021-02-27 13:54:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a55b03a99e1b587d16fd091800acd4c8 SHA-1: b080b7b435121adae2b29672cf4d3087c5563e93 SHA-256: 794336c14b8e0a0754b165f441c92503d47794b2a3529636de89e8bbd91e14d6
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains or link farms, suggesting a spam or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious sites or distribute further malware. While no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards a malicious document designed for user redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/wb?keyword=how%20to%20dress%20for%20disney%20world%20in%20december PDF link annotation
    • https://cdn.sqhk.co/wokinuge/jdp0ibW/home_assistant_docker_windows_install.pdfIn PDF document text
    • http://kazexajisodibu.medianewsonline.com/28126935728.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/gjGuhiG/ragdoll_jump_games.pdfIn PDF document text
    • https://cdn.sqhk.co/mugukawi/GpgehaX/artillery_sidewinder_x1_v4_differences.pdfIn PDF document text
    • https://mitukuruzatag.weebly.com/uploads/1/3/5/3/135346955/xuxelupulujaxoj_wiwimadu_gigewufus_lubasedow.pdfIn PDF document text
    • http://xiledokujajipo.22web.org/11583753379.pdfIn PDF document text
    • https://vujafufitagizej.weebly.com/uploads/1/3/2/6/132696128/kusiwutopanomulaf.pdfIn PDF document text
    • https://nevajuto.weebly.com/uploads/1/3/2/6/132695651/5727701.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/5iaDsgg/keto_chocolate_covered_strawberry_cheesecake.pdfIn PDF document text
    • http://jarewitof.mypressonline.com/rorigavasijej.pdfIn PDF document text
    • https://cdn.sqhk.co/jomutepe/OjauhkX/tozupokixijapokolowuvi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xowobovu.myartsonline.com/146448358.pdfIn PDF document text
    • http://waraxiv.rf.gd/vasaviduj.pdfIn PDF document text
    • http://kazaxeso.rf.gd/xuginurodilisu.pdfIn PDF document text
    • http://gevitejivojo.rf.gd/41217204341.pdfIn PDF document text
    • http://sonapap.rf.gd/playstation_report_stolen_account.pdfIn PDF document text
    • http://xefukogan.rf.gd/67523641928.pdfIn PDF document text
    • http://lekekavom.epizy.com/totodumonegafesawogi.pdfIn PDF document text
    • http://zurabogefu.rf.gd/formation_gratuite_bourse_direct_avis.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_off0000ee0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0B 5252 bytes
SHA-256: e1b0aeccae01e495b7b585159c76e4e46c86e0e9a1b8012379513eab2b9fa57e
font_01_sfnt_off0000ffe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE9 10912 bytes
SHA-256: 24e6ab02568d3832a2944a3f83c799cc8af7c0867278ae991c5157a3d2fc53b1

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