Malicious PDF — malware analysis report

Static analysis result for SHA-256 f61acf5e2facbd37…

MALICIOUS

PDF

75.3 KB Created: 2021-02-21 16:41:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: fd44a07e390099f93bf4b9c5e2b57235 SHA-1: 7443e10b39dd3320d94586395950c3c2e27c3229 SHA-256: f61acf5e2facbd37be7057d7e0222d05e2ddc9585b1a471c8f0bb422ff4cbed5
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://leonvi.ru/123?utm_term=bobbi+brown+makeup+kit PDF link annotation
    • https://cdn.sqhk.co/fumamimed/JtHugh6/18249736761.pdfIn PDF document text
    • https://winalefumigis.weebly.com/uploads/1/3/1/4/131437210/0917e265160a40d.pdfIn PDF document text
    • http://dreamingdeveloper.com/moxikitevuvudirimoyjan3.pdfIn PDF document text
    • https://cdn.sqhk.co/gisepavuv/VughNih/proguides_lol_tier_list.pdfIn PDF document text
    • https://cdn.sqhk.co/japokaxe/S4ieic9/high_speed_pinball_parts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366652/normal_5fe4276fee292.pdfIn PDF document text
    • https://cdn.sqhk.co/wejuladuke/iUgjxRg/gapobupaleduleruje.pdfIn PDF document text
    • https://juladuwupib.weebly.com/uploads/1/3/4/7/134763366/99c0033656.pdfIn PDF document text
    • http://erogan-oficial.site/jurusukigokinusixujemoxowo5r7v.pdfIn PDF document text
    • http://boevoenlp.com/cession_de_vente_voituref5jpo.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/witcher_3_blood_and_wine_achievementgy37w.pdfIn PDF document text
    • http://remont-pc.website/dotuvumeldgmep.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/RPhf42h/yellowstone_season_3_episode_5_cast_widow.pdfIn PDF document text
    • http://distornyup.site/rulizenotejowejabewamuturpavn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370778/normal_5fed5d564a90f.pdfIn PDF document text
    • http://creditpm.com/mutirw9c5e.pdfIn PDF document text
    • https://josabinisepev.weebly.com/uploads/1/3/1/4/131452942/fuzefumilajuka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368235/normal_6031ec530a63d.pdfIn PDF document text
    • https://radogatibemif.weebly.com/uploads/1/3/2/8/132815767/3902154.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418972/normal_5fdad64a163de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415944/normal_6024fe2906915.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/dosipive/oxygen_therapy_guidelines_paediatric.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/batzal_roof_designer_3ds_max_2014.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/pusesenotixapuvup.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/genetics_and_heredity_worksheet_answers.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_off0000e873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE873 5100 bytes
SHA-256: a15a6ca331aafaf2409584f5df8bbdb27c800cfc8c704d449a9663ebfe8f549d
font_01_sfnt_off0000f9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C6 11248 bytes
SHA-256: 2bf6b7a03d5cb6701fd7a9d6507d7a35d3a3a87273d8b4bd85711083efccbe3a

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