Malicious PDF — malware analysis report

Static analysis result for SHA-256 e44f6edc7c29829b…

MALICIOUS

PDF

77.4 KB Created: 2021-02-19 04:55:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 850bb14e0312edaa298a824dc4d21937 SHA-1: 8d41a06ad4f1c1f6d7e8023cb62e6a7ac0bef880 SHA-256: e44f6edc7c29829b08e7cc497971246dc2b0b0df6ee012e5efd93bf2605c12ae
166 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a phishing lure, specifically using a search result pretext for a common technical query to entice users. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely directs users to download a password-protected archive, a common tactic to bypass gateway security. The presence of numerous external URLs, including one flagged as a link farm on disposable hosting, further supports a malicious intent to redirect users to potentially harmful content.

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://seumenha.ru/strik?utm_term=linksys+ea6500+reset+to+factory PDF link annotation
    • https://cdn.sqhk.co/wabasenenem/jjDeZzg/wejetufoxekaponobudazobof.pdfIn PDF document text
    • https://cdn.sqhk.co/sibamoxa/cEyHHij/dademilej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459929/normal_601786570cfcd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453907/normal_5ffe89ce7579f.pdfIn PDF document text
    • http://nisisigewu.iblogger.org/wiperenojopikugixegigemi.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/jbibwig/wingstop_flavors_pictures.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/ggBhd84/worst_game_ever_in_roblox.pdfIn PDF document text
    • http://vulefuxudonad.22web.org/chicago_referencing_guide_websites.pdfIn PDF document text
    • http://fisutef.iblogger.org/essay_about_myself_template.pdfIn PDF document text
    • https://cdn.sqhk.co/jifonakilux/hgjhPQj/92395410809.pdfIn PDF document text
    • http://delojenopow.66ghz.com/3937983751.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446789/normal_601b45af6168f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454302/normal_6021a5a2b3c3e.pdfIn PDF document text
    • https://cdn.sqhk.co/dutigimomana/ghicsqQ/fishdom_online_free_play_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_601b2d27d27a7.pdfIn PDF document text
    • https://cdn.sqhk.co/rosomugimo/egdjjh2/bouncy_castle_for_rent_calgary.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mapegolirij.epizy.com/6294842692.pdfIn PDF document text
    • http://bosulug.epizy.com/cadimage_for_archicad_22_free.pdfIn PDF document text
    • http://xuvotawelotito.epizy.com/datovadinisizarera.pdfIn PDF document text
    • http://xuresiru.epizy.com/33770201659.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_off0000f0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E3 5372 bytes
SHA-256: 9fdf135c136fd8c723f325bf92f0ebf43e89e42825ebd01617c1975572df9d24
font_01_sfnt_off0001034b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034B 10760 bytes
SHA-256: a7ff770a0cbbe875e68b40e5c5c2c1f55020612815a8bc0bf5d520384fb3d05f

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