Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4cda17068de48b4…

MALICIOUS

PDF

82.7 KB Created: 2021-03-27 11:37:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d99e7197ab28778e205132b00bcb8528 SHA-1: 508f7cdd744bd174c503d45cffcc846402ed587f SHA-256: f4cda17068de48b4970d4599165469d37aea3c16a69a69d0e1c19ef95402eb83
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to a keyword search for 'dragon city mod apk unlimited gems and money and food download', suggesting a lure for potentially unwanted software or phishing. The PDF structure also indicates it's part of a link farm on disposable hosting, further supporting a malicious distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://druttle.ru/wix?keyword=dragon+city+mod+apk+unlimited+gems+and+money+and+food+download
    • https://bosewumakujo.weebly.com/uploads/1/3/6/0/136036310/5496859.pdf
    • http://mpvideo.org/wotuligadulebupitowufa6w5.pdf
    • https://cdn.sqhk.co/nuvexajamu/aic6yVc/download_super_soccer_champs_2013_mod_apk.pdf
    • http://goldenframecollision.com/download_the_message_bible_free353b7.pdf
    • https://podogavefa.weebly.com/uploads/1/3/1/4/131438056/3a35434fea1bf09.pdf
    • https://lupolaluxu.weebly.com/uploads/1/3/2/6/132681144/a1420f.pdf
    • https://cdn.sqhk.co/lagusive/jbTo1iB/wakumenevisekebijivevibon.pdf
    • https://cdn.sqhk.co/tavolimogid/P1hjgjf/93927656857.pdf
    • http://jepegupunu.mygamesonline.org/89673779887.pdf
    • https://cdn.sqhk.co/xakalodesi/xbKsjj5/99768718922.pdf
    • https://maparezoja.weebly.com/uploads/1/3/5/3/135321508/vubulotixodu.pdf
    • https://cdn.sqhk.co/futevanu/ciblEe8/fajeduguxiximesoridix.pdf
    • http://gopidap.scienceontheweb.net/brother_mfc-495cw_printer_not_printing.pdf
    • https://datedevob.weebly.com/uploads/1/3/1/3/131381982/8828728.pdf
    • http://catsism.com/99824704870r7l6e.pdf
    • http://peluxuba.sportsontheweb.net/how_much_is_procreate_for_ipad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vusedew.myartsonline.com/20241656340.pdf
    • https://3cd6846c-369c-4875-9c63-132df726a2dd.filesusr.com/ugd/7ab50f_9458e967c1f248238d71c423e9de9058.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5a092d58-dff2-43ea-ac06-c5ede8ef0877/walirexibomajojosifidatu.pdf
    • https://uploads.strikinglycdn.com/files/4151d487-e610-4f43-9bf6-48cc901130f9/the_end_of_the_f_world_season_2_release_date_time.pdf
    • https://86a9da1b-0b57-4b35-a77a-523886b904cd.filesusr.com/ugd/0d9a50_94c4e40d9a594680b1c2ec6fd49e9088.pdf?index=true
    • https://uploads.strikinglycdn.com/files/114d0ddc-cbf6-45b3-8d01-deb9d530cd36/how_many_sweet_corn_per_acre.pdf
    • https://uploads.strikinglycdn.com/files/5b54bfca-44fc-4956-ae96-6ad81b229fbc/gelufexunalasawoxapofidi.pdf
    • http://lodumojokexiku.onlinewebshop.net/how_to_create_a_wordle_in_google.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbde.bin
85d831d2d136e9fc531a75fa771a2a5cf6cca61403cea0137fb5ced6d02d9bab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDE 5732 bytes
font_01_sfnt_off00010f71.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F71 1800 bytes
font_02_sfnt_off000117ff.bin
347cabe9fd0ecffa7a9ce278b566dd09f390f0794cd5fcc529375c30d6d7a4a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117FF 10588 bytes

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