Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c9069a6298b7716…

MALICIOUS

PDF

98.8 KB Created: 2021-05-30 08:08:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 558c6d65c481cc53ad01411bf2fcdc80 SHA-1: 3a5e09ece34bef3b3ff752fb7d465b1f9f890a0a SHA-256: 0c9069a6298b7716def0632f52bd646dcb86cec2db7c6191588b80dd9e2012d9
184 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm. The document body presents a quiz question, likely a lure to encourage users to click the embedded links. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8870

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=which+of+the+following+is+a+difference+between+programmed+decisions+and+nonprogrammed+decisions PDF link annotation
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/tepigegufuv.pdfIn PDF document text
    • https://wawukonuxoni.weebly.com/uploads/1/3/4/0/134095992/favorekipo.pdfIn PDF document text
    • https://semezuzuxikazug.weebly.com/uploads/1/3/4/2/134234688/ac3d1d6228.pdfIn PDF document text
    • https://dorewedekubur.weebly.com/uploads/1/3/4/7/134721360/lufanowapegexakerel.pdfIn PDF document text
    • https://vekejuritikoj.weebly.com/uploads/1/3/1/8/131857631/lawutadig.pdfIn PDF document text
    • https://depujoseteg.weebly.com/uploads/1/3/5/3/135309287/gufadikejizazudasodi.pdfIn PDF document text
    • https://damenuxorofupob.weebly.com/uploads/1/3/4/7/134711178/7481342.pdfIn PDF document text
    • https://dewixazupeteti.weebly.com/uploads/1/3/1/4/131455636/a0f87bde16e1.pdfIn PDF document text
    • https://lewaxirilukuxod.weebly.com/uploads/1/3/0/8/130813115/3873546.pdfIn PDF document text
    • https://piwunosorelid.weebly.com/uploads/1/3/4/5/134590209/tafalixekagaja.pdfIn PDF document text
    • https://wexabegolorumad.weebly.com/uploads/1/3/4/3/134351445/8336dc2a12c.pdfIn PDF document text
    • https://bixemasabomevis.weebly.com/uploads/1/3/4/5/134517571/756d89b2c.pdfIn PDF document text
    • https://vinosubolab.weebly.com/uploads/1/3/5/3/135316207/b11c26af58ddec.pdfIn PDF document text
    • https://fojinotumure.weebly.com/uploads/1/3/0/8/130874368/murosoren-wedup.pdfIn PDF document text
    • https://tugojomabam.weebly.com/uploads/1/3/4/5/134588125/4516533.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/bc76c103-a3af-4860-9890-2cb5dffeb4c7/wowujevulosap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/485876ed-7ff1-435f-a9f3-4bdcba2e0762/wutusamopekifowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe93818c-61d5-4593-9801-a5970e0e5566/walther_pk380_pink_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b106f5d3-38e2-4301-9ee9-e30a9c4c2c37/how_much_is_a_tempus_fugit_clock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21cb9766-bf59-4fe7-a675-757ffe320a55/la_leccion_de_august_libro_en_ingles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/766b7d32-319b-4b2c-970a-6fa269460b96/hp_laserjet_2100_driver_for_windows_7_64_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/585fd85a-0d5b-4376-9bbb-72b900f69527/honda_cb_450_nighthawk_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0794556b-cfcd-4708-8db8-531665ce9146/lemejudereperaruvuxajap.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000173db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173DB 5812 bytes
SHA-256: 016b649ab62a10f6f04286baf8aab06951191aa7d775cb8d8cf3106397e210d8

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