Malicious PDF — malware analysis report

Static analysis result for SHA-256 e15af26ac754d8ba…

MALICIOUS

PDF

64.0 KB Created: 2021-03-12 13:30:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cb17324a307833594d33cfcbb11535ef SHA-1: 867419daea12a6fe602793dcebe217395a7667bb SHA-256: e15af26ac754d8baf05d3e75fee55510ac293867ebcb21d68090e79bf7c43f26
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 0.8600

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://bologen.ru/award?keyword=equality+act+2020+disability+pdf PDF link annotation
    • https://cdn.sqhk.co/vufebevefo/gjeJwjd/surikesupozewiko.pdfIn PDF document text
    • https://cdn.sqhk.co/sofilita/jdjbibg/baua_all_comedy.pdfIn PDF document text
    • http://xejevojesinil.22web.org/hot_cross_buns_sheet_music.pdfIn PDF document text
    • https://namoturobiro.weebly.com/uploads/1/3/0/7/130739164/8f9ca410dadac75.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/igeJ0ji/norepaloruwufov.pdfIn PDF document text
    • https://mopobaseburole.weebly.com/uploads/1/3/4/8/134859053/4313742.pdfIn PDF document text
    • http://faxusigeroles.sportsontheweb.net/al_fajr_clock_daylight_saving_setting.pdfIn PDF document text
    • https://cdn.sqhk.co/fiseguvugele/1Y7hfgh/44832462783.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_1c0e777741394119bb6cf43726c362b7.pdf?index=trueIn PDF document text
    • https://d6aab468-caab-4d9e-910f-d3bf64ae4104.filesusr.com/ugd/5438e3_2446d1211fd74977abe22a36a05ee470.pdf?index=trueIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_d311cf0381be45a3aeda015031bc1abd.pdf?index=trueIn PDF document text
    • https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_7bcf6032a80d43a98543ad3b8d749054.pdf?index=trueIn PDF document text
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_b6513398f37341079cd550234e5662de.pdf?index=trueIn PDF document text
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_59299a70cac94888b4ae14009785be4a.pdf?index=trueIn PDF document text
    • http://zupitatip.atwebpages.com/msi_890fxa-gd70_price.pdfIn PDF document text
    • http://derekage.epizy.com/14768879093.pdfIn PDF document text
    • http://vajapojaperusu.myartsonline.com/78623818371.pdfIn PDF document text
    • http://fizufanotujo.epizy.com/17677662282.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_off0000e6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FF 5652 bytes
SHA-256: 01c296fd36ace1b5d6587eba5b9020c6c8e1879c67e59019b67ce7d57010d0bc

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