Malicious PDF — malware analysis report

Static analysis result for SHA-256 28db42a8ae1f4edd…

MALICIOUS

PDF

49.5 KB Created: 2021-05-10 06:36:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 34fe481c946cba874fef69e426f7baec SHA-1: a695a8def248bb65717050bde8ee304beb17e804 SHA-256: 28db42a8ae1f4edd3f2200b8d7efb17e4ef90904d3efd645b268c61086cacf03
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9344

Heuristics 4

  • 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
  • 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://jottigo.ru/strik?utm_term=how+to+get+treatment+for+social+anxiety+disorder+with+cbt PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479454/normal_601ae13aa0f6c.pdfIn PDF document text
    • http://frontglass.xyz/you_know_my_name_sheet_musicc5i00.pdfIn PDF document text
    • http://detonic-de.website/dota_auto_chess_cheat_sheetxaqv1.pdfIn PDF document text
    • http://f1l3download.site/83760382674lxkcj.pdfIn PDF document text
    • http://topshops.website/ba_1st_year_sanskrit_bookoq9tk.pdfIn PDF document text
    • http://13millions-warzone.store/run_ronnie_run_soundtrack7rwt3.pdfIn PDF document text
    • http://ihsteam.ru/does_whirlpool_dishwasher_have_a_filterrghss.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420743/normal_5fdd6580071a2.pdfIn PDF document text
    • https://cdn.sqhk.co/rotexopapi/HnDjbih/sejemivevotesolex.pdfIn PDF document text
    • http://lyudi23.ru/tikitazezasurapugize3hp33.pdfIn PDF document text
    • https://cdn.sqhk.co/rolidofajug/2XODcCD/custom_maps_minecraft_switch.pdfIn PDF document text
    • https://cdn.sqhk.co/kekumumaxow/ccDfgjK/xexesipobolubiluvodo.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzemesafe/ahgwKha/73962167065.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/hec_ras_tutorial_step_by_step.pdfIn PDF document text
    • https://fa886832-b9e3-4ce5-a98c-97da2614721f.filesusr.com/ugd/9f8050_f646aa5c3f49451fa47e418705c60213.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zesixefe/474811623.pdfIn PDF document text
    • https://eed7fa7e-4f31-4ba6-8269-e73f07ac74c5.filesusr.com/ugd/93374d_1875dc0e05e741c6aac1e4c5bdca4a3f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fipijife/wovomepame.pdfIn PDF document text
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_d7bed530d11e4464b2b522ce63344d84.pdf?index=trueIn PDF document text