Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfad19ecc596b3db…

MALICIOUS

PDF

67.6 KB Created: 2021-01-29 06:35:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 50b97130787119a1968744cdfe3512e4 SHA-1: 9d201b52d73584e83725cdc7e3fc60d49e575436 SHA-256: dfad19ecc596b3dbfd56cf7d44f2bab2929c984c856ca64e39cd492186edf68f
184 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a significant number of external links, suggesting it functions as a link farm designed to redirect users to potentially harmful websites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest an attempt to manipulate search engine results or phish users by directing them to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8239

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://leonvi.ru/aws?utm_term=baie+de+brassage+informatique+en+anglais PDF link annotation
    • https://cdn.sqhk.co/puwupasakej/WBOjejj/2174730520.pdfIn PDF document text
    • http://maxufadewodov.22web.org/atorvastatin_mechanism_of_action.pdfIn PDF document text
    • https://cdn.sqhk.co/kewesowovim/5M2jjxi/21760364166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490251/normal_5fe79c98032db.pdfIn PDF document text
    • https://nurinakeviwiket.weebly.com/uploads/1/3/1/4/131407921/1396852.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/dbhcuhh/gokijuwugatunojazopuni.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/YZjbIhe/day_r_survival_premium_apk_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/jidelugob/rh9ihjM/32268919943.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454561/normal_6008826344cf9.pdfIn PDF document text
    • http://atomlinux.com/learn_html_coding_freeq3m8u.pdfIn PDF document text
    • http://mini-cam1.club/judoxugw2md2.pdfIn PDF document text
    • https://cdn.sqhk.co/niwonosorude/cgdnUta/moduledatotax.pdfIn PDF document text
    • https://cdn.sqhk.co/jemajujo/igjdjjJ/solo_apk_for_android_10.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/ggfigge/65890064138.pdfIn PDF document text
    • http://trastqort.online/sky_force_reloaded_switch_guide6joef.pdfIn PDF document text
    • http://kmplitka.shop/usce_beograd_kontaktjdtc5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tezogaxexinaga.rf.gd/93003697546.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_off0000f109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF109 5544 bytes
SHA-256: 05ea6faf695ea6206f7e3f2d812fdc649baf815440a2da95a9734f9041a28acd

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