Malicious PDF — malware analysis report

Static analysis result for SHA-256 21f0a2d5be193b95…

MALICIOUS

PDF

67.9 KB Created: 2021-02-16 16:39:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e91b695f1e919b9771978d1d8276a2e5 SHA-1: a6709b147219d2cb7800f66ba28771902db5760a SHA-256: 21f0a2d5be193b9559d4b06c198501c6ea5e7b69dc3cf7df90c19305c2647247
196 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.
  • 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/wix?keyword=ellipses+and+hyperbolas+worksheet PDF link annotation
    • http://steelsho3.club/fat_sick_and_nearly_dead_food_pyramidf06l4.pdfIn PDF document text
    • http://wibebilija.22web.org/pokemon_gba_games_hack.pdfIn PDF document text
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/junutig.pdfIn PDF document text
    • http://expressvpn.store/feralewozezinilepaxutxz7n8.pdfIn PDF document text
    • https://funofumid.weebly.com/uploads/1/3/4/8/134886651/6141600.pdfIn PDF document text
    • https://cdn.sqhk.co/jobiwokojo/K6ujhbi/10918355587.pdfIn PDF document text
    • https://cdn.sqhk.co/wikaraxixi/g63Bjfu/79052190572.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/aZ0gfk2/zemelivoranutegal.pdfIn PDF document text
    • http://ver-alex.website/mimpi_hamil_itu_artinya_apaxjt3c.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/napoledunadigo/12381648233.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/gegukepetobokorujakokafan.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/tupatebu.pdfIn PDF document text
    • http://rozopujonabesix.epizy.com/54543336807.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/koxijaki.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/93082333322.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_off0000ce4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE4B 5400 bytes
SHA-256: 63471d0864a051589ac3f829226aca971a26e907b1baadb3b6a70fd166d4715d
font_01_sfnt_off0000e0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B1 9852 bytes
SHA-256: 248f5c9d6db686e7157127cc9ac4d79396ed8ecd2ed0a5d48ee118b495de6226