Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff928d5dbefe7904…

MALICIOUS

PDF

63.3 KB Created: 2021-02-06 00:41:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 43aed15c5a5e50fb32cecf4e8df330fd SHA-1: 8119b66fa7b3c6d679f26b2c8dae2c1af76da699 SHA-256: ff928d5dbefe7904de92e5b1ec1382e8aab6bfef19654e8a5ff2d95f7720c262
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=krishna%20bhajan%20are%20dwarpalo%20sudama%20song In PDF document text
    • https://bivixogerixud.weebly.com/uploads/1/3/4/4/134469213/mutunubakun.pdfIn PDF document text
    • http://finansi-7.online/alaska_airlines_ticket_informationcpqmt.pdfIn PDF document text
    • https://cdn.sqhk.co/dufukeraj/dOhi7gd/labyrinth_maze_pc_game.pdfIn PDF document text
    • https://cdn.sqhk.co/sufiwotag/WgifO3t/74867833490.pdfIn PDF document text
    • https://kovekigesig.weebly.com/uploads/1/3/1/1/131164481/remigitofaxup.pdfIn PDF document text
    • http://jadebey-x.com/semobesajuxojurilukerej1axb5.pdfIn PDF document text
    • http://smeshnoykir.space/mejixobuwu7mpjt.pdfIn PDF document text
    • http://leree6.club/1682509389nwtho.pdfIn PDF document text
    • https://cdn.sqhk.co/noxutuvixi/bRK0iib/80868458329.pdfIn PDF document text
    • https://biteledazuxol.weebly.com/uploads/1/3/4/3/134315761/c72bfac505.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477873/normal_5ffbb20386607.pdfIn PDF document text
    • http://dragonflysagewellness.com/rutefajadazabejudupazu7r3bq.pdfIn PDF document text
    • https://musevurimimurom.weebly.com/uploads/1/3/4/7/134711136/1377827.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/laradusa/60895926783.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/best_ebook_reader_for_books.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/information_about_indian_flag_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/axios_upload_formdata.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/35605853985.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_off0000bd08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD08 5652 bytes
SHA-256: fcf26777992f41b52ed971b8c0a29d17ff95038aae33c1328d1ddd4a94637edd
font_01_sfnt_off0000d024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD024 9440 bytes
SHA-256: 7e7082efc1aede83f596e14f3abe06f05f49fb98c9a572fe8e803c12f71c6102

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