Malicious PDF — malware analysis report

Static analysis result for SHA-256 7054b07d6e57db6e…

MALICIOUS

PDF

89.0 KB Created: 2021-04-02 21:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ba26fce3bbf03cfd7c5304afcabc4c25 SHA-1: 9f60474df5027f34f32eb9b6e90128fad1204d7e SHA-256: 7054b07d6e57db6efd8533f6cffeb70a1cbb7a62ae8c1556c46d2e3c409b9f57
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, with one pointing to zajinet.ru, suggesting it's designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a structure aimed at maximizing links on disposable hosting, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://zajinet.ru/123?utm_term=chinese+movies+english+dubbed PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4499285/normal_5ff4cd0834193.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376362/normal_60490a2c5eb9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_602f4b4c748cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446931/normal_6023dae12154e.pdfIn PDF document text
    • http://gativatur.getenjoyment.net/894907141.pdfIn PDF document text
    • https://bulewafaki.weebly.com/uploads/1/3/4/6/134682315/4447344.pdfIn PDF document text
    • http://wabaxifejem.sportsontheweb.net/catecismo_explicado_de_la_iglesia_catolica.pdfIn PDF document text
    • https://semizafug.weebly.com/uploads/1/3/1/8/131871859/7455028.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453721/normal_5fe58aeb50c5d.pdfIn PDF document text
    • http://tabanozu.iblogger.org/what_are_the_best_home_coffee_makers.pdfIn PDF document text
    • http://richteam.site/ignou_mca_solved_assignment_2019-_20_freewubrw.pdfIn PDF document text
    • http://topmassage.net/definition_of_international_law_according_to_oppenheimuoii3.pdfIn PDF document text
    • http://istlan.space/damivevujawabasuvemetuwr45sn.pdfIn PDF document text
    • https://mumetimobenuja.weebly.com/uploads/1/3/2/3/132302956/de93c538.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gojoxefesubir.epizy.com/tutorial_itext_java.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46ef32e9-e25c-411a-ada9-058f8c44b0c5/aaron_king_winston_salem.pdfIn PDF document text
    • http://wufofot.rf.gd/laxupososofaw.pdfIn PDF document text
    • http://kixiwuru.epizy.com/sijizujawujeveg.pdfIn PDF document text
    • http://furipurisebete.onlinewebshop.net/calisthenics_workout_program_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10e6c17c-475c-4b00-b701-3c39e1550020/new_york_new_york_drum_sheet_music_trumpet.pdfIn PDF document text
    • http://gagolabirej.atwebpages.com/ritubulezutubabikalexezaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d02c3af-902c-4ea4-ac05-9961fc7e881b/97328761101.pdfIn PDF document text
    • http://gadudadu.rf.gd/death_note_opening_1_violin_sheet_music.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001032a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032A 6928 bytes
SHA-256: fb26b1bb7855d54cc56898586d8c2783a048e6b3390570ab30cdc0556047acef
font_01_sfnt_off00011b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B13 5036 bytes
SHA-256: fa64aebe6d2ff0bd551c8207a4a2f72d499c44ff05df27dead2221fe681780f3
font_02_sfnt_off00012c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C14 11748 bytes
SHA-256: 7e546b6ab0819865a444ef6f1fe3a8336cfc6e2fa318455ea5346740a440e711

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