Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c0979ad5792c05…

MALICIOUS

PDF

74.1 KB Created: 2021-05-21 11:24:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 69d776e65ca0238fa33718130b356515 SHA-1: 68d5b73fc4367d4a82b66bb03b9e8c23bd6bfd78 SHA-256: 58c0979ad5792c05b4787ef3cfc294f8cd3031a3f42b5a7414f6773eefcad027
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URL 'https://mezovuduw.ru/strik?utm_term=assassin%2527s+creed+syndicate+t%25C3%25BCrk%25C3%25A7e+yama+indir' is a primary indicator of the lure content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/strik?utm_term=assassin%2527s+creed+syndicate+t%25C3%25BCrk%25C3%25A7e+yama+indir PDF link annotation
    • https://piziwola.weebly.com/uploads/1/3/1/3/131382430/191666.pdfIn PDF document text
    • https://vigekajabaka.weebly.com/uploads/1/3/4/7/134708837/kapiruzakogo-dofojubaf-nujili-jivos.pdfIn PDF document text
    • https://fakegegi.weebly.com/uploads/1/3/5/3/135312823/834699.pdfIn PDF document text
    • https://xulavuxedipi.weebly.com/uploads/1/3/4/0/134017657/9331193.pdfIn PDF document text
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/pisasojirivajogusige.pdfIn PDF document text
    • https://jofetafoba.weebly.com/uploads/1/3/4/4/134485710/285983cf1003e.pdfIn PDF document text
    • https://piwaxiru.weebly.com/uploads/1/3/4/8/134882920/mavojibaluvubiperome.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c00fea8-df74-4272-8ea3-96a0efefbd00/los_juegos_del_hambre_3_sinsajo_parte_2_online_latino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f469f23f-822b-45b5-bff8-f4e63c9eefec/48736889907.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/36846887120.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/31894803328.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d01a6d4-858d-4745-a322-05e5295b85da/buparigufevopobajifolapiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/557f0329-b0c4-4e58-81ce-e95bb2d56164/can_you_work_as_a_paralegal_while_in_law_school.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/64047885407.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/the_five_love_languages_for_singles.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/cervical_cancer_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/harrisons_principles_of_internal_medicine_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/puloviferigugulaxozofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fbb1f15-a816-4ddc-8647-f427f809faf8/present_perfect_subjunctive_spanish_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/add3c35a-1590-488c-8b17-c375fa27c285/marta_bus_map_120.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cba650b-1865-4d6b-acd1-7bb3ca58985c/what_happens_if_you_pass_in_family_feud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71352f06-b4f7-4348-967a-ba95a6fff685/58912472780.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/how_to_cook_frozen_chicken_nuggets_in_a_pan.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/74791121405.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_off0000df0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0C 5544 bytes
SHA-256: 47322961580681b8ede0a8d344dd48709d364336e86694a4b3d5172e16a7d6a5
font_01_sfnt_off0000f169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF169 12372 bytes
SHA-256: c803c351df76b9cd0040b9091cbf2f5331b8b216e5bc10555113996ceafc63ff