Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6c3d4d066ca9d10…

MALICIOUS

PDF

77.7 KB Created: 2021-03-28 14:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 5bf9a5fcf8f0631adcce759d3250d283 SHA-1: 9e9d5aecdd758c890f4939594525449ec9b6ba51 SHA-256: e6c3d4d066ca9d10dc70821fef6f813f697d1e7c5360f52b42f9f8e2fffff99c
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate an attempt to redirect users to potentially malicious external sites.

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://druttle.ru/award?keyword=cuento+el+axolotl+pdf PDF link annotation
    • https://cdn.sqhk.co/rapedipular/idji8Ba/slicer_3d_view.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/dT3Kuha/dual_survival_cast_member_dies.pdfIn PDF document text
    • https://cdn.sqhk.co/nigezufi/cHzjfjh/virtual_piano_with_notes_names.pdfIn PDF document text
    • https://cdn.sqhk.co/pidikuso/dgehggj/vunotulubunok.pdfIn PDF document text
    • https://cdn.sqhk.co/fowifabibu/jhfgeKr/98081690786.pdfIn PDF document text
    • https://cdn.sqhk.co/zumiredosuwi/ggiiYji/racing_war_games_pc_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pisomuma/gcsjiig/34099134507.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisezepemu/Hhjafid/the_dream_vr_inc.pdfIn PDF document text
    • https://cdn.sqhk.co/laripikiwafo/lNyTgiE/zara_sale_dates_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/77060075242.pdfIn PDF document text
    • https://5c817321-7c0c-448b-959d-deb1da9fd788.filesusr.com/ugd/19103d_a33b9e9c113243f2ade8041e708349d5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/simujix/rerozuxidadumideledobape.pdfIn PDF document text
    • http://baguzakanaso.epizy.com/what_is_a_good_performance_goal.pdfIn PDF document text
    • https://d05b2b94-0af3-401c-a6ef-75d00d0b58ae.filesusr.com/ugd/3bca44_a78f0a88f3ef4130800ca28a1760e694.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zugutixe/mirabuximupudovar.pdfIn PDF document text
    • https://a26b494c-4f54-4b9d-aaa3-e02d462d315a.filesusr.com/ugd/c6268f_008733956f7e449d9c1f74184c04fb4e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/xupidutugunudoxidojil.pdfIn PDF document text
    • http://vaxavapokun.rf.gd/diwefageku.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/gigizikisakenuba.pdfIn PDF document text
    • https://4b523d79-2bc6-404f-8e52-0acae4d2cb03.filesusr.com/ugd/fe1b41_c4344629438f4643ac0097c25814f232.pdf?index=trueIn 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_off0000f0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E2 4732 bytes
SHA-256: ef1bacfd7e0bd0f1b2bc9c1b9748a1d1d222bf1b72208f37507c7f12a409065f
font_01_sfnt_off00010119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10119 12148 bytes
SHA-256: 6451472296ee7574e021f55bff62c29199ac1a6cec2540c7fb692f7144cf5c6e

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