Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b319f7a129855c4…

MALICIOUS

PDF

68.4 KB Created: 2021-02-27 08:13:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4a1f9f452943c80f8bfca59eb2c13573 SHA-1: 4f9f0fc2bef21c961d32e11349bd6324894321d5 SHA-256: 6b319f7a129855c469343c2fc6ee7ee788c776f443aaa39a7a9824b2c7b16a5a
186 Risk Score

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://vilenefex.ru/award?keyword=echo+srm+230+owner%2527s+manual PDF link annotation
    • https://cdn.sqhk.co/xarozowuzosa/hbjbhdd/91328716933.pdfIn PDF document text
    • https://cdn.sqhk.co/xerolunem/cQchfl1/i_wish_you_would_english_grammar.pdfIn PDF document text
    • http://bighome.space/what_lenses_are_compatible_with_nikon_d610i4ynw.pdfIn PDF document text
    • http://magic-world.site/kagiriselawizojivejye47g.pdfIn PDF document text
    • https://cdn.sqhk.co/buwuvibija/EegeQqY/56193536287.pdfIn PDF document text
    • http://nijalatol.mypressonline.com/thrustmaster_t-flight_hotas_x_flight_stick_ps4.pdfIn PDF document text
    • https://vunojomilubokub.weebly.com/uploads/1/3/0/7/130775688/rufivabometonekofo.pdfIn PDF document text
    • https://cdn.sqhk.co/retepisej/UoN3gdj/corona_virus_frontieres_europe.pdfIn PDF document text
    • https://vixevugipun.weebly.com/uploads/1/3/5/3/135327752/5559401.pdfIn PDF document text
    • http://tacfitproducts.com/thousand_and_one_nights_restaurant_beijingh3yzc.pdfIn PDF document text
    • http://smartycredit.info/hotstar_tv_shows_freedx6lz.pdfIn PDF document text
    • https://cdn.sqhk.co/gixekoji/ellG9gg/suvugu.pdfIn PDF document text
    • https://cdn.sqhk.co/rubutemoxe/cM2TNrY/american_civil_war_museum_gettysburg.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/perfume_the_story_of_a_murderer_2006_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/wepunajexiju/CheXjjx/risavijafasevizepemaxe.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/jegjjij/nodivuzigoxakefavakogima.pdfIn PDF document text
    • http://lg-copyright.com/pc_4_unit_limits_of_sequences_worksheetbvk57.pdfIn PDF document text
    • http://lg-copyright.com/litofujorivagijivwwb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xomapagovujux.atwebpages.com/gedapisotule.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_off0000ce04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE04 5560 bytes
SHA-256: 0554e45060bbfd6c7dd3869fc56b859e4c78de76fbd1daa7719ea74c33f6d75a
font_01_sfnt_off0000e0d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D5 10328 bytes
SHA-256: 3fc3f02958f5b867399a00c40b82ca684187b6c966bc39b7ebeb78dc5c09463b

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