Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc2767ba8a86efbb…

MALICIOUS

PDF

69.6 KB Created: 2021-03-24 14:48:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4462a7cc394182cf437f41d7cc3e78f0 SHA-1: 0389efd1b7265b825d09831ca11c6a80b7cd5c82 SHA-256: bc2767ba8a86efbb223d70c82979f0708b9c9cac49bba406fe41ece4834a56be
184 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 0.8491

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 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.
  • 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://gimoguvi.ru/strik?utm_term=what+is+the+main+message+of+the+story+the+little+prince PDF link annotation
    • https://velazidolis.weebly.com/uploads/1/3/0/9/130969689/birururexotazu.pdfIn PDF document text
    • https://cdn.sqhk.co/diwewiduvaz/geHq0jg/free_templates_certificates_of_completion.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446380/normal_60082cbeb4217.pdfIn PDF document text
    • https://valiwuvubeke.weebly.com/uploads/1/3/4/6/134694219/c98df3e.pdfIn PDF document text
    • https://cdn.sqhk.co/tabewinudeka/ugihhii/cool_school_ask_miss_booksy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457854/normal_6020c1e7ba78e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416934/normal_5fe037a5cce85.pdfIn PDF document text
    • https://gorasanoso.weebly.com/uploads/1/3/1/8/131859135/6648538.pdfIn PDF document text
    • https://wasavegod.weebly.com/uploads/1/3/4/5/134589575/nuzofidoweku.pdfIn PDF document text
    • https://cdn.sqhk.co/vapitinab/eiWgdhb/itek_actionpro_sports_camera_manual.pdfIn PDF document text
    • https://baxawomegofagu.weebly.com/uploads/1/3/2/8/132815114/3b756d2.pdfIn PDF document text
    • https://sesirolomozanu.weebly.com/uploads/1/3/2/7/132741009/remisobeti.pdfIn PDF document text
    • https://zuvagojajom.weebly.com/uploads/1/3/5/3/135398962/b7f00c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/946f094e-686e-4c7b-ae5d-9ab8aaa644a4/67085742972.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc2dfc2b-642f-4cf9-b1b7-008c8a603c6e/chess_puzzles_app_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b98a5cd7-d458-4594-aad2-7c6240046221/how_to_get_small_knots_out_of_string.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09d624ef-7749-4ed7-8471-c0b857b38085/is_craftsman_still_guaranteed_for_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e528532-8115-468c-a03c-8288db587da9/berakuna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed5e87c8-6513-4eb5-9f98-f701f4731565/daniel_fast_recipes_and_menu_planner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2db0f4e-2e0b-4f88-a4f9-ed12dca9dd87/belkin_n300_wifi_range_extender_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/945b3b07-ea6c-4ba8-9412-233b1035941c/what_does_trop_mean_in_greek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/956202a9-5a8e-4131-b327-f3464c1fc2e3/pupedajig.pdfIn 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_off0000e75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75A 5544 bytes
SHA-256: 88b620bf65f38788df919e90084b74a043def1d91d3a8212ce4aaddb6a0f5cf6
font_01_sfnt_off0000fa23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA23 10524 bytes
SHA-256: a2a855d5c467bd57450f3ed7c0062c0a9bf8e629610a43ad67f8e1afbb3636c3