Malicious PDF — malware analysis report

Static analysis result for SHA-256 407fe0e97aba2198…

MALICIOUS

PDF

77.7 KB Created: 2021-03-13 17:15:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 49b811125dce85c7452898a23c5883a8 SHA-1: a6e78e9f9178cf977774fc62307379c7d116934c SHA-256: 407fe0e97aba21989124a874b8db47e04558be022ceb94e3a0dd33de9f78001d
126 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URLs, such as https://xezojetit.ru/wix?keyword=divisiones+de+fracciones+con+diferente+denominador, likely lead to phishing or malware download sites. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/wix?keyword=divisiones+de+fracciones+con+diferente+denominador PDF link annotation
    • https://cdn.sqhk.co/puwidebudojo/icajjhh/steam_voice_chat_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunadegu/4Glbgg7/fox_fan_adventure_time.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379744/normal_603611d9a8b85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490720/normal_5fd6aa9b3d6d0.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/mjbjiXz/fury_road_trailer_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417817/normal_5fc9e036f3eda.pdfIn PDF document text
    • https://cdn.sqhk.co/joraxeneli/jdicVzg/18984655348.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimanujage/eIgljfi/fakilekora.pdfIn PDF document text
    • https://cdn.sqhk.co/xafukapewe/iiCLyfG/caller_id_block_calls_name_and_location_tracker.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502833/normal_6046e58ce78ec.pdfIn PDF document text
    • https://cdn.sqhk.co/jukelifawap/ighjje6/bug_s_life_ant.pdfIn PDF document text
    • https://cdn.sqhk.co/mozejipakas/R5H1PKv/zabiduxomiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470821/normal_5ffc972ce63ce.pdfIn PDF document text
    • http://discovljzg.fun/where_is_petra_destiny_228agh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467561/normal_601a41e9493a7.pdfIn PDF document text
    • http://apple-fruit.space/no_place_to_hide_movie_plot977c5.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/the_cycle_of_socialization_bobbie_haqy3ob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471481/normal_5fe910ac30904.pdfIn PDF document text
    • http://bred-enligne.com/active_and_passive_voice_examples_with_answers_for_class_10zxefa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369496/normal_5fee671de5a32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427284/normal_601ffc6182cd7.pdfIn PDF document text
    • https://cdn.sqhk.co/zutujodara/chb30xr/one_page_responsive_website_template_bootstrap_free.pdfIn PDF document text
    • https://cdn.sqhk.co/bujutinape/hlpjY3d/can_you_use_coupons_for_walmart_delivery.pdfIn PDF document text
    • https://cdn.sqhk.co/kaxovugefulo/Liagehc/cheat_sheet_ruby.pdfIn PDF document text
    • http://digitalmedialit.com/how_to_cook_fish_fillets_on_weber_qcguk5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF025 5196 bytes
SHA-256: 550e0d7508cab123f1edb83cb19206d0f99ff957587dcb137ebbfcf9b6d0d2cb
font_01_sfnt_off000101cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CB 12052 bytes
SHA-256: fbcbd4be9ae463e1501c63e715cbe9086e72dc6b0c41adfbb9d069cc8b826b30