Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a79e52bcd31735a…

MALICIOUS

PDF

69.7 KB Created: 2021-02-26 06:52:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8b6621e8c97eea748bb4647921654b18 SHA-1: 8eaea1e25e7c78d424fb2a00e6ffd77a1057959e SHA-256: 3a79e52bcd31735a0a8b7b628af8a34012ab2f613a69983aea8d994479efd308
246 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://xisevulatunetu.weebly.com/uploads/1/3/4/5/134595014/taduf.pdf.
  • 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/award?keyword=fl+studio+mobile+3+manual+pdf PDF link annotation
    • https://xisevulatunetu.weebly.com/uploads/1/3/4/5/134595014/taduf.pdfIn PDF document text
    • https://zunitilamurako.weebly.com/uploads/1/3/4/5/134529552/kemematamidex.pdfIn PDF document text
    • https://cdn.sqhk.co/pabefidinaz/hidHRjj/photo_video_editor_with_song_download.pdfIn PDF document text
    • https://sewetinupas.weebly.com/uploads/1/3/3/9/133997680/rukejoxufanarosoni.pdfIn PDF document text
    • http://4kuhd.me/29935882344xc2fr.pdfIn PDF document text
    • http://senteber.site/435269875327jl5j.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/what_does_time_and_space_mean_in_a_relationship.pdfIn PDF document text
    • https://cdn.sqhk.co/salefudodid/lidhajf/bowling_near_me_prices_uk.pdfIn PDF document text
    • https://mevemedetu.weebly.com/uploads/1/3/1/8/131871578/07be53.pdfIn PDF document text
    • https://visizejafu.weebly.com/uploads/1/3/6/0/136093068/tabitupumumox-verirejis-fofedotod.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/Zhdmgf3/football_soccer_world_cup_champion_league_2018_apk.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/get_tough_approach_to_crime_definition.pdfIn PDF document text
    • https://veguxalefimas.weebly.com/uploads/1/3/1/3/131382166/ripinitokizu_bulurapovixi_jasav_jomigezorij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faxiruvud.myartsonline.com/23949209958.pdfIn PDF document text
    • http://ligoroxenafof.atwebpages.com/world_of_darkness_combat.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_off0000d1d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D8 5348 bytes
SHA-256: 363b7b5aa2551923038ebaac3e26f2dfd98e6c35ad5f9326e9d1cf0c41ed422e
font_01_sfnt_off0000e3ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EF 11152 bytes
SHA-256: 82c2efc674ad048a9fee9414dd82aec59c9b06be8ad9bb4ddf345c69663d5f03