Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac4a1478ee13440a…

MALICIOUS

PDF

68.9 KB Created: 2021-02-17 07:58:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: a5cfbb3811f9cfe930b52e1335eb2d8b SHA-1: 53389963a1e679dbe2a4528b4717fcf0aed34aba SHA-256: ac4a1478ee13440a70c83b7759229df10f80232a0d18d275b57fce6568e01a7e
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://jacksth.ru/wix?keyword=the+secret+life+of+bees+theme+forgiveness PDF link annotation
    • https://cdn.sqhk.co/rutunidosaw/icUhhci/pizajomigavugixivagote.pdfIn PDF document text
    • https://cdn.sqhk.co/ginijetemepa/gHWnEhb/258959036.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/cFFWge9/free_parental_app_for_iphone.pdfIn PDF document text
    • https://zufefofavenubu.weebly.com/uploads/1/3/0/7/130775539/pipaxedixum-volit-dogipenulapux.pdfIn PDF document text
    • https://cdn.sqhk.co/letiludixo/iejbNG9/how_to_do_graffiti_art_with_spray_paint.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/bUGCugi/panelefatek.pdfIn PDF document text
    • https://bizepusenovub.weebly.com/uploads/1/3/4/5/134509919/radutal_wilev_suteg_jogega.pdfIn PDF document text
    • https://vusowosunuk.weebly.com/uploads/1/3/5/9/135975823/kamoxef-rilulebenowos-pasevurelidone.pdfIn PDF document text
    • https://cdn.sqhk.co/badiwugaleko/et7W085/43353460857.pdfIn PDF document text
    • https://cdn.sqhk.co/zifuvifiweva/jacggWC/vexizexuze.pdfIn PDF document text
    • https://cdn.sqhk.co/balekunu/SjWDtrl/64317551767.pdfIn PDF document text
    • https://guwemegarorara.weebly.com/uploads/1/3/4/3/134353603/gobavaja.pdfIn PDF document text
    • https://cdn.sqhk.co/teforoke/i9Kilgg/highwayman_poem_lyrics.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://watekiz.rf.gd/business_development_planning_template.pdfIn PDF document text
    • http://meguwuzib.rf.gd/risuxegolinobetumazemo.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_off0000d205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD205 5236 bytes
SHA-256: e598674a1722b4532f33f3aa039b35865980e945e786f2dad172f0ba1bfed382
font_01_sfnt_off0000e3b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B9 10228 bytes
SHA-256: b9d1f0f9cb410b11aea0abc309935a8cb6c3807125a61bbedd61b20b01f0096b