Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b7984ed3a69bfbb…

MALICIOUS

PDF

79.4 KB Created: 2021-02-08 18:23:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: be4d6f3a033df691b37f8f451fea493d SHA-1: 68e1774a0474fa7818ce585a75ce34790685f175 SHA-256: 3b7984ed3a69bfbb016c23e547966dce45a2d214404a9f09e11cca6cbf9e0027
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://leonvi.ru/aws?utm_term=isotopes+worksheet+answers+key PDF link annotation
    • https://cdn.sqhk.co/remimidotomi/bzGNOge/9356572668.pdfIn PDF document text
    • https://cdn.sqhk.co/ravawiku/ib2ii3A/pocket_bully_size.pdfIn PDF document text
    • https://cdn.sqhk.co/bitanalagep/gjhngdZ/zakilo.pdfIn PDF document text
    • https://cdn.sqhk.co/nilimijano/ZiejfHE/modern_sofas_for_sale_uk.pdfIn PDF document text
    • https://zoperugojoboriv.weebly.com/uploads/1/3/1/3/131379643/xivub-sakusevek-zudamukopit-jupaji.pdfIn PDF document text
    • https://mixowikijanolu.weebly.com/uploads/1/3/1/8/131856844/vitazozikuza-dutaxononu.pdfIn PDF document text
    • https://cdn.sqhk.co/fotenulutis/gdrpIxG/52753015748.pdfIn PDF document text
    • https://cdn.sqhk.co/dorusafe/Yhhgfha/best_local_breakfast_spots_in_las_vegas.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/Txshcje/nearpod_code_for_canvas.pdfIn PDF document text
    • https://cdn.sqhk.co/wusezofetib/BdLLijH/best_country_music_singers_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/kowazodonaf/iiagi2O/80001307833.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/jaWZcw2/vasowuduselimuzulo.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/dRjjid6/police_vs_zombies_download_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/waximanodif/jEhcjbe/85694821522.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lulevewutowa.epizy.com/pemomereruwet.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_off0000fa0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0F 5072 bytes
SHA-256: 9a13a64738e6263e5cec0888ac8e60de841bd260a8f51d0ef7dbc2aebfc787a7
font_01_sfnt_off00010b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B62 10944 bytes
SHA-256: 8e983334871532f508db487cda7834feb37e6ae8a64c17ccc3411fe74b121e5a