Malicious PDF — malware analysis report

Static analysis result for SHA-256 91da467f2b184e12…

MALICIOUS

PDF

68.6 KB Created: 2021-02-22 13:47:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 172c37cc17443384e4c32cff7859084c SHA-1: 980c573f17a1406a221446c4deb07b1d889a179c SHA-256: 91da467f2b184e1204ba63b2fcefacbfce73e1af91c3b757b8e09a4199127b96
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://jottigo.ru/wix?keyword=the+extraordinary+adventures+of+alfred+kropp+pdf PDF link annotation
    • https://kofivenemiwelew.weebly.com/uploads/1/3/1/3/131380814/a73f059.pdfIn PDF document text
    • https://cdn.sqhk.co/jebumujo/2hgtnEV/24687433918.pdfIn PDF document text
    • http://idealslimitaly-official.site/aprender_ingles_en_linea_gratis_interactivokfv31.pdfIn PDF document text
    • https://zonulufeviwupaz.weebly.com/uploads/1/3/2/8/132814448/3793109.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/Rjajahb/best_teppen_decks_qr_code.pdfIn PDF document text
    • https://cdn.sqhk.co/nigudovowa/txGWCjb/sales_tax_kohl_s_online.pdfIn PDF document text
    • https://tidixusega.weebly.com/uploads/1/3/1/3/131380021/xemaforimidakezok.pdfIn PDF document text
    • http://zdorovienashevse.xyz/senate_election_results_election2020bk9gn.pdfIn PDF document text
    • http://grafoanaliz.ru/wigisipusixaj8ar4.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/ganubatebedoxez/96527603892.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/gekovijepodo.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/guitar_backing_track_maker_free.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/vetezafezopofekimabate.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/bihar_board_scholarship_form_2019_date.pdfIn PDF document text
    • http://vewofosel.rf.gd/agile_testing_life_cycle.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/pexixufepoj.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/29955561458.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_off0000d01b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01B 5372 bytes
SHA-256: 674e8f994a949c00c81bdedc7c76d11f8e9771d55bd140c0864cd20a9a5d30bd
font_01_sfnt_off0000e26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26E 10136 bytes
SHA-256: adad9c9a009d0a7993cf31a4335428c3fdef96530e8ed94524fc2919e491cf7f

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