Malicious PDF — malware analysis report

Static analysis result for SHA-256 f352bd00c869dd32…

MALICIOUS

PDF

77.5 KB Created: 2021-03-14 07:03:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b253e8bf1476265037f5dfa6d953ab66 SHA-1: edcf01eaa425f4182a62857f9c7b93e64e44a3e8 SHA-256: f352bd00c869dd322a951d637ff713493ee3552c6f6af2c371c26edf6ab7a261
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to malicious sites, potentially for credential harvesting or to download further payloads.

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/award?keyword=tax+rates+for+fy+2020+19+pdf PDF link annotation
    • http://appletopshop.ru/jozidozafitemuwoleferegxsqp.pdfIn PDF document text
    • http://mscgis.net/4597020903pa19e.pdfIn PDF document text
    • http://life50it.pro/it_support_resume_sampleiaj97.pdfIn PDF document text
    • http://pornbustyvids.com/nuvuwevogarujoruwufuz5k43z.pdfIn PDF document text
    • http://lubozamesorox.iblogger.org/school_uniforms_should_be_mandatory_conclusion.pdfIn PDF document text
    • http://hookup153.space/what_is_the_point_of_view_in_the_yellow_wallpaper_apexyavm0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://maretubozewugi.myartsonline.com/free_download_islamic_books_urdu_language.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4261551a-0aac-4a1f-ab18-33820505d7df/can_you_go_to_jail_for_prostitution_in_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c55b616-1843-4343-8549-d84f47354511/who_played_the_twin_sister_in_a_simple_favor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22e99818-9d43-459c-9bef-61600d995eaa/9352238890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3be11497-2246-41c1-a0fc-2376544eaaa5/how_did_captain_lees_youngest_son_pass_away.pdfIn PDF document text
    • http://dadizapapegase.rf.gd/votujojovub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37b2caa7-9e0e-4fa1-a508-e31220702e01/rudunozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a69d04a-3518-4feb-a3e1-ec3694a4dbe5/openpilot_cc3d_revolution_buy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87a7481f-1072-4f85-92a3-cae121ff4d54/53647700912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffdc2908-0fdd-4b4e-ac1b-2f73ba96f7d0/animal_farm_movie_trailer_youtube.pdfIn PDF document text
    • http://limoxukuk.atwebpages.com/bawuvumawaxiwadatale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97211fe1-f73e-40c7-89ef-17b1dbaf6d50/how_to_use_baby_potty_seat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cfe86c1-fbc5-4253-ac3d-60dfc0cec589/30739959746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b850016-68a5-4f25-ac3d-cc8c9cbedd0f/riwobabatoginetobosaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/132e8f55-ebce-434b-828e-ac4e5a2b28e1/how_to_program_honeywell_5834-4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a2bc1f6-f05d-4d58-8b88-6503a086cb5b/bivuvapajetegozef.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_off0000ef74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF74 5604 bytes
SHA-256: f0bff12991c9ffa459f7121eef8147694f7f1ec20d7b31b2393c18fd6d38401a
font_01_sfnt_off000102a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A4 11204 bytes
SHA-256: cd860ce64712e43da59c9d98ef204f37df8748ecbf9256c5e57c3dafd1d90230