Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bfe175d9a70adcd…

MALICIOUS

PDF

80.2 KB Created: 2021-05-11 05:12:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 665a3a87bfaad267155a177ba84b914d SHA-1: 2a9ff6d808d58ffe4bd5fdbaa8333980aab5be44 SHA-256: 2bfe175d9a70adcd3804304e5d1896de3716cbbbcc6a989de028a1bb03c5c29f
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a lure related to medical symptoms ('Embolia cerebral') and includes an external URI pointing to a suspicious domain, identified as a potential phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious resource, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=embolia+cerebral+s%25C3%25ADntomas+y+signos PDF link annotation
    • https://cdn.sqhk.co/libibajuzumu/BhfSf9K/tokaido_shinkansen_tickets_tokyo_to_kyoto.pdfIn PDF document text
    • http://bestrongbyg.com/can_you_negotiate_rent_with_a_property_management_company_reddithi82y.pdfIn PDF document text
    • http://sodaapp.pro/pifugiroxi8uzdh.pdfIn PDF document text
    • http://agencymedia-ig.com/theseus_and_the_minotaur_story_in_hindihqi4u.pdfIn PDF document text
    • http://meriline.store/virtualbox_user_manualxncqe.pdfIn PDF document text
    • http://mklhhhh.space/bemazikomiviforexarmisn2.pdfIn PDF document text
    • http://sis-paypal.com/forex_trading_in_india_basicsffdbb.pdfIn PDF document text
    • https://cdn.sqhk.co/luwonowuwig/gfMppjf/61115222572.pdfIn PDF document text
    • https://cdn.sqhk.co/doparibi/igitfjc/gameboy_color_zelda_link_s_awakening.pdfIn PDF document text
    • http://regvoolkim.website/wigosuxedow9zc5.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/lurutopobi/xawuvupivimilivofexujen.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/yale_acceptance_letter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7617728-a40d-40ed-af8d-4d8c1ab477d8/badiwun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/570a53a9-e281-4784-8ef1-2e653b2992b3/chronicles_of_amber_reading_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dbcaf60-72fa-418a-a0a4-0272b2894bb8/14306368216.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/video_maker_windows_xp_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/forgotten_realms_map_5e.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/91667776285.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/kajugafurewokasozuv.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/80076561913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e413887-e8e7-406f-ad98-d059af737cac/fuvedazusovunutal.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7A 3312 bytes
SHA-256: a14950173e5d1d1f1c70576ac3dafa31bb0aa6ece26b8d12516862096ecff79f
font_01_sfnt_off0000fa5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5B 5372 bytes
SHA-256: 49629edef655aaa8cf43b6b70450211dd83aad153dec57e946d8bdd4ef1cbbbe
font_02_sfnt_off00010c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C97 11220 bytes
SHA-256: 1ba32bb5b905c3b1d3e20eb06e9c7e36a19844702f5a90f460f88f8f6f713099

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