Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c8fa0e5db2f8b84…

MALICIOUS

PDF

80.0 KB Created: 2021-01-26 02:12:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7b2198958a4ef7121b435274094fe310 SHA-1: eed38a65eb7035a4a01c318a0cb67510c8e11e56 SHA-256: 2c8fa0e5db2f8b84755e4a5821efeb8ce5496cf3cba38f2142defe49564e9941
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/wb?keyword=hashtags%20for%20instagram%20fashion PDF link annotation
    • https://cdn.sqhk.co/supesuvepo/fbWjgic/tipimisunavuvivazodugoput.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366005/normal_5fe10ff5bdf8b.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/Ylif5Bf/minecraft_pocket_crafting_table.pdfIn PDF document text
    • https://cdn.sqhk.co/miropefaneka/5hh1XMW/28260056722.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403129/normal_5fddf91cc7398.pdfIn PDF document text
    • https://zewemoledomuro.weebly.com/uploads/1/3/4/7/134746436/weridiwabi_situjutanejolaj.pdfIn PDF document text
    • https://cdn.sqhk.co/togokitaz/hcghvpI/into_the_dead_2_zombie_survival_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/f54c4je/gadamasanirenukobivad.pdfIn PDF document text
    • https://cdn.sqhk.co/jalizovi/ekib7jg/centre_de_formation_ifort_avis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393511/normal_5ffcefc2bd6f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444874/normal_5fdc10ebba9b1.pdfIn PDF document text
    • https://cdn.sqhk.co/vekasurox/UhGpih7/3119810894.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosewude/FrgdUXE/receiving_international_calls_straight_talk.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/ghJPggw/download_game_the_elder_scrolls_blades_mod_apk.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/jadudusujuje/calibre_app_for_android_free.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_off0000fe50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE50 5108 bytes
SHA-256: a0a462118c907259b7ef79888f155e9035cb0b7ed98f98dc744facaaf00fd325
font_01_sfnt_off00010f87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F87 10452 bytes
SHA-256: b3ffba661d1a77bc38d55c0fa0d8fb32153cfee0970aa264076288ac1ddea0c3

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