Malicious PDF — malware analysis report

Static analysis result for SHA-256 b04f47d5de954f14…

MALICIOUS

PDF

74.6 KB Created: 2021-03-25 03:57:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43eceb23ad368fef25cc30fb69a9770f SHA-1: 7bec353b0a8a8ed0fd76fac3324237d06b109efb SHA-256: b04f47d5de954f14e4173013f0cb17d823105d024d104d413e8acfd50549ee12
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are structured as a link farm for APK downloads, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious workflow designed to trick users into downloading unwanted or harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=4liker+apk+download+latest+version+2020
    • https://sitegevom.weebly.com/uploads/1/3/4/6/134664280/jajevavabagixezu.pdf
    • https://cdn.sqhk.co/dibadigodem/7o0jhfA/bahut_hard_tik_tok_song_pagalworld.pdf
    • https://cdn.sqhk.co/wikelere/dm0fidY/mewisapoxubofixabarap.pdf
    • https://cdn.sqhk.co/nugutobudan/ifiefja/x_runner_game_play_online.pdf
    • https://bizitodavil.weebly.com/uploads/1/3/4/3/134321392/9781619.pdf
    • https://cdn.sqhk.co/jinubodilev/gMa8G0D/89964258220.pdf
    • https://cdn.sqhk.co/fabetojowuje/ihjijhv/science_channel_go_subscription.pdf
    • https://cdn.sqhk.co/rejoxapuzopa/jKieiei/67006870252.pdf
    • https://cdn.sqhk.co/lorotukogof/9UUUhgi/spider_stickman_game_online.pdf
    • https://cdn.sqhk.co/vekunego/jJtgixB/84104250768.pdf
    • https://cdn.sqhk.co/xuvisisitinu/ifgZjir/change_lock_screen_on_iphone_7.pdf
    • https://cdn.sqhk.co/lisupixiwe/LFLhjja/80983602799.pdf
    • http://gododerur.66ghz.com/billionaire_casino_slots.pdf
    • https://cdn.sqhk.co/vexedobasof/ihp3jdR/download_car_simulator_2_og_mod_apkpure.pdf
    • https://cdn.sqhk.co/fugovigul/jdiijdp/poblanos_menu_snellville_ga.pdf
    • https://cdn.sqhk.co/zadoweferoxe/S6hdchf/bowling_ball_dead_baby.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6b9ff03a-ef48-417a-a14c-919df0f903d0.filesusr.com/ugd/f459ea_c2a6a43c454647cf92f1a7c0781157c4.pdf?index=true
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_dc0d6304874641d4b48a2357ba1ce0e0.pdf?index=true
    • https://436c154b-1c2d-4c60-9768-ed3a268ef5e1.filesusr.com/ugd/e8e253_9342a254d33d4b3fb97077c342ab2201.pdf?index=true
    • http://sugizujesel.epizy.com/kali_linux_wifi_hacking.pdf
    • https://a2c67b61-a01d-4053-b7ad-f1487bca8054.filesusr.com/ugd/24853a_19a35d1457f14f92919423dc7fc92604.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_off0000e65c.bin
2e145eecc93f0f76814ddd41ef979cfab4a56b7c1fbd9e6f136c069ebde10431
pdf-font-stream PDF embedded font (sfnt) at offset 0xE65C 5436 bytes
font_01_sfnt_off0000f907.bin
e9674a286ddcc8ae6ee90d058337f0372ba1807853ae8ccdf90ce7aeb7993940
pdf-font-stream PDF embedded font (sfnt) at offset 0xF907 10448 bytes