Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba45e07f56d9c993…

MALICIOUS

PDF

80.9 KB Created: 2021-04-05 14:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f8e28222290febda0c92ba9d631113a SHA-1: 5100de7628496dc73eeefb30c2cffed424eceaca SHA-256: ba45e07f56d9c993a6a7ff687532047f7038db713b92fd79aef7ddc50c76903e
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.007 JavaScript

The PDF document exhibits social engineering tactics, specifically a 'ClickFix' and 'Remote Support Lure' heuristic, instructing the user to run commands or install remote access tools. The embedded URLs and link farm heuristics suggest an attempt to direct the user to malicious sites. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely to facilitate further compromise via remote access or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://botokaw.ru/strik?utm_term=onn+wireless+mouse+troubleshooting
    • http://fakaluwu.scienceontheweb.net/1016142671.pdf
    • http://suzupuwejal.mygamesonline.org/99042146574.pdf
    • http://lebofawudire.mygamesonline.org/33752478626.pdf
    • https://mekapejodefab.weebly.com/uploads/1/3/4/7/134740006/6169080.pdf
    • http://pawusewi.sportsontheweb.net/tissot_t-touch_manual_sync.pdf
    • http://xibiselid.medianewsonline.com/skyrim_se_skyui_error_code_4.pdf
    • http://filozajerezabi.getenjoyment.net/least_common_multiple_definition.pdf
    • http://jujovobima.getenjoyment.net/47870933988.pdf
    • https://nozabuzewetuk.weebly.com/uploads/1/3/2/6/132683147/d15222.pdf
    • http://silujokiz.mypressonline.com/11134791604.pdf
    • http://tuderoba.getenjoyment.net/how_to_contact_nespresso.pdf
    • https://pizopivawot.weebly.com/uploads/1/3/5/3/135347149/403a9eb544b5548.pdf
    • http://vipadobotisituz.mygamesonline.org/why_mars_and_venus_collide_sinhala_translation.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/buxoparadazegu/deformed_babies_from_chernobyl.pdf
    • http://jisijuvod.myartsonline.com/xesoxapezusugosomiti.pdf
    • http://nixomirorubu.myartsonline.com/86069142428.pdf
    • http://rexefobixavater.myartsonline.com/matlab_subplot_no_gap.pdf
    • https://s3.amazonaws.com/jiwotarotavuz/bing_maps_apps_free.pdf
    • https://s3.amazonaws.com/gurafoga/dapivifizetive.pdf
    • http://situwosase.myartsonline.com/watchmen_graphic_novel_free.pdf
    • https://s3.amazonaws.com/tarajix/the_lottery_shirley_jackson_questions.pdf
    • http://xejobutek.onlinewebshop.net/84289745474.pdf
    • http://mivurukelino.onlinewebshop.net/fedex_air_waybill_template.pdf
    • http://tiwosutodegadax.onlinewebshop.net/kowowijemidejamoweb.pdf
    • http://wenibeliso.atwebpages.com/zifajuwut.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f021.bin
3244859bddc9c3d4aa551f3b1e59fc3c49e3b8a89f4f80685b732fcd41fdaba3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF021 5028 bytes
font_01_sfnt_off00010121.bin
0d8a3fe124b9f68bcace67025f17f35f16135eea1abd8e43e83b4871cdd0c9e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10121 10920 bytes
font_02_sfnt_off000125ec.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125EC 4324 bytes

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