Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a4ca1c69205ad37…

MALICIOUS

PDF

81.3 KB Created: 2021-03-24 07:34:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b0b8d00aae92dd6fca2fd6ba05a6e55 SHA-1: e0c2ab4034a6c3d04baa60b97291f588e11f30f9 SHA-256: 3a4ca1c69205ad3771bbc04cae21e430e81b73c752e72704c044d7f0ff29c802
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/strik?utm_term=diy+wood+dungeon+master+screen
    • https://cdn.sqhk.co/sisadenev/jrirWjh/chinese_checkers_board_size.pdf
    • http://sandwichhq.club/league_stuck_at_94e5zhy.pdf
    • https://cdn.sqhk.co/rejiwosujupa/ehbVUid/arjun_patiala_all_songs_pagalworld.pdf
    • http://fortuneo-enligne.com/my_doro_phone_will_not_charges8gla.pdf
    • http://mumijivamivaxij.medianewsonline.com/juwef.pdf
    • http://vabademajelid.iblogger.org/68007755890.pdf
    • http://kinorio5.xyz/norobapupiraog1a2.pdf
    • https://cdn.sqhk.co/nufopusifa/jt4igi0/81984050384.pdf
    • http://bibivire.mygamesonline.org/puxuze.pdf
    • https://cdn.sqhk.co/rujiwujik/fljjcjc/mezasopekenawupasodeju.pdf
    • https://cdn.sqhk.co/dojopaxitovi/SUaje9q/gabivijuxelef.pdf
    • http://lobabinuladeri.medianewsonline.com/jekitidal.pdf
    • http://bisewilorilamej.sportsontheweb.net/dewejet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gebesetumanime.epizy.com/the_evolution_of_the_eohippus_into_the_modern_day_horse_is_an_example_of.pdf
    • https://e33362eb-94ba-4427-a888-6f4863169a18.filesusr.com/ugd/36ce96_a4c51656073a49e188c9694f77f93ef2.pdf?index=true
    • https://s3.amazonaws.com/zerejibixupav/redasu.pdf
    • http://jamebixidi.rf.gd/medical_terminology_a_living_language_free_download.pdf
    • https://80c93ba6-74df-4afb-9852-3a83eaba20e3.filesusr.com/ugd/4cf28d_ef5070c888884ee49a4b71eff5b063cd.pdf?index=true
    • https://01ff271a-2d66-4e22-ac0f-a796646d2f56.filesusr.com/ugd/8d93e9_52919f997cad49a9b1e071d1571f6076.pdf?index=true
    • https://62619d47-812b-4c4f-a232-aa08d86264e8.filesusr.com/ugd/6d62c1_53134dee21ef44b3a21632a0f9975e7a.pdf?index=true
    • https://s3.amazonaws.com/bidurudilidujug/diaper_genie_assembly_instructions.pdf
    • https://6648aa49-deb3-4d6f-81a8-a63cc7a297fb.filesusr.com/ugd/38eac1_651f4fb9cbd54d4fa648993362bc851b.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd3a.bin
8592f078234feb1e8b5dd52874185a08dc657fba2f73a983fc18420871863d79		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3A 5420 bytes
font_01_sfnt_off00010fad.bin
7fe6408667992c706efe6040ab4dfa20d2f250d64e6e2ee23c66de0fbe2dd277		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAD 11228 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.