Malicious PDF — malware analysis report

Static analysis result for SHA-256 f41d5ab750f0835c…

MALICIOUS

PDF

80.9 KB Created: 2021-04-06 00:43:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 0ae73da38e9e48ee64aa4a89b8a44a89 SHA-1: c7502e725f66c6c2c93c9211db9c727277f5038f SHA-256: f41d5ab750f0835cb37fcb36f1e0ceb94e5de40935e1495090791561cc13cdcd
194 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics, including ClamAV and an ML classifier, and contains numerous external links. The presence of a 'download button' lure and the structure of a link farm suggest an attempt to trick users into downloading software or other files. The embedded URLs and the PDF's structure indicate it's part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • 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://druttle.ru/wix?keyword=movie+box+apk+ios+10.3 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465259/normal_5fe02b4b31101.pdfIn PDF document text
    • http://jotijitod.66ghz.com/simcity_buildit_mod_apk_apk_home.pdfIn PDF document text
    • http://women-ita.space/basunudofilelizo6q6.pdfIn PDF document text
    • https://notefusiwedamap.weebly.com/uploads/1/3/4/8/134872173/gafubozar.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/jimi_hendrix_little_wing_tab_songsterr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443337/normal_600150b367891.pdfIn PDF document text
    • https://ridulajevu.weebly.com/uploads/1/3/4/3/134352946/nugepivifigaz-kowowuvaxuboki.pdfIn PDF document text
    • https://posenumu.weebly.com/uploads/1/3/0/7/130776111/janofejezi_fasokajoxeseruk.pdfIn PDF document text
    • https://likizosuzi.weebly.com/uploads/1/3/4/8/134886942/xukonag-rosozemefer-fusoloze.pdfIn PDF document text
    • http://auto-fishing-rods1.club/8th_grade_weekly_spelling_wordsbnbb0.pdfIn PDF document text
    • https://kalokawagubur.weebly.com/uploads/1/3/1/3/131398574/lenexovalaru-vipapaguvese-topibikulamo.pdfIn PDF document text
    • http://lexamopelezun.mywebcommunity.org/83707944066.pdfIn PDF document text
    • https://gokidobizivoji.weebly.com/uploads/1/3/4/4/134495246/3bf71ffc12cd8.pdfIn PDF document text
    • http://oficialshoes.site/didizasilotidogokutumagz5jpt.pdfIn PDF document text
    • https://buwigare.weebly.com/uploads/1/3/5/3/135308802/wuwife-toxetexeve-jazapaxedafut-fijifabe.pdfIn PDF document text
    • http://xadeginutoriri.iblogger.org/excellence_oyster_bay_jamaica_address.pdfIn PDF document text
    • http://sekelenogake.getenjoyment.net/67136156309.pdfIn PDF document text
    • http://mokaxizekebade.scienceontheweb.net/mugasasajolaveberajog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460233/normal_604cf70a5ed27.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://naxilolebepup.epizy.com/86974270062.pdfIn PDF document text
    • http://pudolajuji.atwebpages.com/44823855507.pdfIn PDF document text
    • http://piwufamudadavo.rf.gd/how_to_do_advent.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_off0000fc20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC20 5412 bytes
SHA-256: dbd26a68fbf1ce9d175b4bfaf7fdc95bf7a289d1d4135d352c0d6fd5a442782f
font_01_sfnt_off00010ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBF 11240 bytes
SHA-256: ee7bc72c89b790b701a0db92f8e0e51755464c1d5dc549b1c1b5130c43133dd7