Malicious PDF — malware analysis report

Static analysis result for SHA-256 89dc719d427e7264…

MALICIOUS

PDF

90.3 KB Created: 2021-04-28 22:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: f882068821eed653c2c11fa270eaa285 SHA-1: 2dfe7f96c5421e819754cdbf67b72bb3195b319d SHA-256: 89dc719d427e72649e7b783210b273a3c644d9b940b2abea5e4ef432f0c2e968
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL being `https://gimoguvi.ru/strik?utm_term=sahih+bukhari+volume+2+hadith+414`. This URL, combined with the PDF's structure and the ML classifier's high confidence, suggests a phishing or malicious redirection attempt. The document body, though heavily obfuscated, contains text that appears to be a lure for search terms, further supporting the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/strik?utm_term=sahih+bukhari+volume+2+hadith+414 PDF link annotation
    • https://cdn.sqhk.co/pinofizulag/hehhyno/guide_safe_notification_app.pdfIn PDF document text
    • https://cdn.sqhk.co/doxurozupu/gnhgfhc/after_world_war_1_germany_turned_to.pdfIn PDF document text
    • https://cdn.sqhk.co/mugapowejog/gfifgig/ants_in_house_texas.pdfIn PDF document text
    • http://naligixe.getenjoyment.net/12_cranial_nerve_assessment.pdfIn PDF document text
    • https://kokujefep.weebly.com/uploads/1/3/1/4/131409677/7655760.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/iiegdhf/football_referee_clothing_uk.pdfIn PDF document text
    • https://bavifevip.weebly.com/uploads/1/3/6/0/136049805/6753326.pdfIn PDF document text
    • https://cdn.sqhk.co/gelowidabik/hihjdMY/dezuwin.pdfIn PDF document text
    • https://bavefazetujew.weebly.com/uploads/1/3/1/4/131406687/f90773044964a25.pdfIn PDF document text
    • https://kukurako.weebly.com/uploads/1/3/5/3/135321284/penebejifepo-mukudebikudewo-lomelikozeva-jobupiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zogoxuf.atwebpages.com/macbeth_short_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/68477790205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/468e9b31-e6a7-40df-86f9-1ee44074f438/66324719051.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/charlie_chaplin_tamil_movie_in_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/ferrari_f40_for_sale_ebay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2ddf6b8-8bf0-43e8-a906-16e7fecee532/jukerizudawomut.pdfIn PDF document text
    • http://nisetekotixob.myartsonline.com/gigefidebusexunasu.pdfIn PDF document text
    • http://gixejemazob.myartsonline.com/malayalam_bible_study_books.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/chhello_divas_2_gujarati_movie.pdfIn PDF document text
    • http://zisukuvi.atwebpages.com/85439557751.pdfIn PDF document text
    • http://vasakuzepilaxi.onlinewebshop.net/what_degree_should_i_get_for_data_science.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/summer_waves_15ft_metal_frame_pool_cover.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000132d3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x132D3 23444 bytes
SHA-256: 41269b87796de1677f8f56d585bc601b3425a6d74557e9a728bf62e88eb3fd5b
font_00_sfnt_off0000fa0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0D 5528 bytes
SHA-256: 1fc140d7feaa5ed7e45c97d726c5e0fbe261a862fe33c64de19eabb331ebffa2
font_01_sfnt_off00010cbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBD 11468 bytes
SHA-256: e96de6c48aea4a2ad6f1f5c856a65eb1a0c6a8c04a0e7750d8dad696f5309b00