Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4e0978db07789bb…

MALICIOUS

PDF

71.3 KB Created: 2021-03-23 12:09:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b999a3356fb55b63069eb7375e58af8a SHA-1: add66a39e0a70ffb6b84a01f908cbfd94d5541fa SHA-256: b4e0978db07789bba5c42b5d5b6e937b9cd27ae0c52a1022a398380a181306ee
196 Risk Score

Malware Insights

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

This PDF file contains numerous external links, many of which point to SEO-optimized redirectors. The primary malicious URL identified is https://dugedepap.ru/wix?keyword=tignanello+crossbody+sam%2527s+club, which likely serves as a lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://dugedepap.ru/wix?keyword=tignanello+crossbody+sam%2527s+club PDF link annotation
    • https://cdn.sqhk.co/vovidonob/dTidDOR/nova_launcher_setup_backup_file_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/f1gfib8/parkour_stickman_race_game.pdfIn PDF document text
    • https://cdn.sqhk.co/malofavu/iaNifja/37262848289.pdfIn PDF document text
    • https://zalekekowijix.weebly.com/uploads/1/3/5/3/135346798/2872773.pdfIn PDF document text
    • https://noxurawikatiner.weebly.com/uploads/1/3/1/1/131163986/kudapepubogukaxewu.pdfIn PDF document text
    • https://cdn.sqhk.co/raguwubives/xAjcbHA/joplin_high_school_football_field.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/aBShfih/flying_car_robot_flight_drive_simulator_game_2017.pdfIn PDF document text
    • https://bolojowugupi.weebly.com/uploads/1/3/4/8/134886087/diteb_batapokolajem.pdfIn PDF document text
    • https://duxetaxegijojem.weebly.com/uploads/1/3/4/8/134870405/193b3ed1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/804441dc-445b-4de7-9ece-94bb980c25fd/86436975175.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/along_for_the_ride_movie_netflix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d2c4523-e095-4a3a-87e2-6b64393c0835/19549022726.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef767b1c-f192-4d4f-98ad-80c897beec00/bugera_v22hd_infinium_head.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06a4dda0-9ef1-4423-bc30-bc783425da64/18841387668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f676b92c-fdaf-4fe2-8e79-bc5af826e1e5/nespresso_delonghi_descaling_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/sorisegipek.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/6735789549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaf2c056-7156-4b9d-ae4a-5e79980d62bf/51185853065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05bcf690-b62a-4a5e-81b9-be39201d3b24/the_unofficial_harry_potter_spell_book_wand_movement_illustrated.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/accelerator_manager_dam_ultimate_activation_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e841533-1595-4327-966d-aa4b343a79ac/bipojujivefotujemepusol.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/birthday_song_punjabi_ringtone.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_off0000da91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA91 5484 bytes
SHA-256: 06a2d2f70540937b49430ff3fb6b6d8401f3b53524f3b720e6470839e03d21f5
font_01_sfnt_off0000ed2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2E 10212 bytes
SHA-256: bfbe58c5f8bb08773177f77e6a9e03bc1620295203f0b864545fd4ca83b767fc