Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d4bf7c2c22a3969…

MALICIOUS

PDF

92.2 KB Created: 2021-06-07 16:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 10c56c03cfb9d43159590fce641f0111 SHA-1: 46b5799e6413c329363ab9b74d8b74b8864a8f3c SHA-256: 7d4bf7c2c22a39691877c3a36c3685b778b070be3481877f7f3d277f2a7fef94
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • 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://medvor.ru/pbw?utm_term=blood+vs+crip+fight PDF link annotation
    • https://diminulagiv.weebly.com/uploads/1/3/4/4/134489960/dixesojisizaf.pdfIn PDF document text
    • https://zotexujefu.weebly.com/uploads/1/3/4/3/134322023/mibefago-kesalaririmikij-wotovitotudig-jabuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://boxedaw.pbworks.com/f/lfs_s3_unlocker_free_download.pdfIn PDF document text
    • http://vakerul.pbworks.com/w/file/fetch/144512829/piwizaleruriso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e4d0c20-8f34-438d-83ab-f19aa28b4d5b/how_to_use_nutribullet_1000_series.pdfIn PDF document text
    • http://sutodoromar.pbworks.com/f/dodiganibagagosoka.pdfIn PDF document text
    • http://xejujaser.pbworks.com/w/file/fetch/144787989/king_kong_full_movie_in_hindi_dubbed_2005_hd_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b61c5b79-2f88-499e-a0af-97787d3cbb6a/is_porsche_owned_by_vw.pdfIn PDF document text
    • http://vazufatar.pbworks.com/f/vipewivezududun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d70cf61e-31bf-452e-851e-3285a802b6cd/fallout_shelter_board_game_rules.pdfIn PDF document text
    • http://kuzimotum.pbworks.com/f/features_of_post_industrial_society_in_500_words.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9aed5fa8-bf04-4219-a5d7-597ba41053e3/what_does_high_platelets_mean_in_toddler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c319df97-28ac-478b-8464-41207627f893/maze_runner_2_trailer_dublado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86e1d622-a906-40f1-b4e1-9367d7b73983/proform_hybrid_trainer_pro_installation.pdfIn PDF document text
    • http://gamaxidad.pbworks.com/w/file/fetch/144536757/wixuk.pdfIn PDF document text
    • http://xefobukeza.pbworks.com/f/20679258195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/369ab493-3551-4e21-a84e-b0d4d6e89944/the_art_of_agile_development.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49929520-dd7f-4902-a1c5-8cd73bd67d09/pokemon_fusion_generation_gba_download_android.pdfIn PDF document text
    • http://rozeluf.pbworks.com/w/file/fetch/144562554/pusejekupojavomasatofurul.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_off00012ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA7 5316 bytes
SHA-256: 6455efde4754b896c28869379dd8222e36611ae68765beea04509e85b357d8bd
font_01_sfnt_off00013dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DC4 11164 bytes
SHA-256: 6e69f5fd3cb73281f03b84586221bacd07d10ecf0570c0343fc2a12d60fab66f

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