Malicious PDF — malware analysis report

Static analysis result for SHA-256 a409b7b183dce2fc…

MALICIOUS

PDF

87.7 KB Created: 2021-03-14 09:45:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fe3e6cbe44daa21deec92df21fcd7b6d SHA-1: 33149435d5e37db48b444830dd38528b82faa6b6 SHA-256: a409b7b183dce2fc32e8c3a4f38d11d080c76780c5c09f99194de0e81b5b5bd1
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://mezovuduw.ru/wix?keyword=forensic+hair+and+fiber+analysis+powerpoint+study+worksheet PDF link annotation
    • https://cdn.sqhk.co/tixukiko/gZjagde/deus_ex_gog_machina_clothing.pdfIn PDF document text
    • https://rudozusaviso.weebly.com/uploads/1/3/4/0/134041113/fugatuzezodomoge.pdfIn PDF document text
    • https://cdn.sqhk.co/zumedizojas/bbhgeAk/schleich_farm_world_pferdestall_42485.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzededoz/ugfhemB/neon_balls_bricks_breaker_apk.pdfIn PDF document text
    • https://dekedenavit.weebly.com/uploads/1/3/4/6/134612093/jomiledevej.pdfIn PDF document text
    • https://cdn.sqhk.co/wodabakope/GghiaSn/galactic_conquest_mod_battlefront_2.pdfIn PDF document text
    • https://cdn.sqhk.co/mifimafonuku/cifihJl/dezakeguwuziwafazizimav.pdfIn PDF document text
    • https://funifagokose.weebly.com/uploads/1/3/2/6/132681236/gabus-fepusota-tikaxuv.pdfIn PDF document text
    • https://cdn.sqhk.co/siloneza/gjx6gci/kuzaxowo.pdfIn PDF document text
    • https://cdn.sqhk.co/saxezekobida/jdjihaX/arcade1up_nba_jam_roster.pdfIn PDF document text
    • https://cdn.sqhk.co/lenawemijixe/icnJicX/paint_sprayer_for_cabinets_reviews.pdfIn PDF document text
    • https://retorize.weebly.com/uploads/1/3/0/9/130969817/gusexepijeta-zuniko.pdfIn PDF document text
    • https://cdn.sqhk.co/pefibovip/XfjghhN/fishdom_app_free.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/rokuwapesu/eclipse_oxygen_for_jee_developers.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/73153595948.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/35319228194.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/whatsapp_gb_2019_atualizado_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/how_to_rig_a_fishing_line_for_river_trout.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/a_an_the_no_article_exercise.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/motorola_surfboard_sb6141_blinking_blue_link_light.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/que_es_fotografia_aerea_en_geografia.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_off0001154a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1154A 5596 bytes
SHA-256: b2891987e7d4b781c62495c869727c5b337c94b2d620e34ae64c95333b240f1d
font_01_sfnt_off00012861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12861 11344 bytes
SHA-256: f87eb3815fd912a59c9acdde83f3a807728e170b056e2a4ec0e2af73d5a39109

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