Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf363063de61c4f6…

MALICIOUS

PDF

77.1 KB Created: 2021-03-20 17:19:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bfcfe633ee449a2bace58757599a4a7e SHA-1: 59bf566d70809ae62c7b96246800dd728107b95a SHA-256: cf363063de61c4f62c26fc66e8d8f22156d6cd568839f66439f903fe60990953
194 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://soxebez.ru/award?keyword=cattle+farming+project+proposal+pdf PDF link annotation
    • https://cdn.sqhk.co/nitumatemi/3giiiXz/zafarivo.pdfIn PDF document text
    • https://cdn.sqhk.co/toriwogadej/nhadgcf/gebavotinufulaxisixex.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/B4ihjbd/wewuta.pdfIn PDF document text
    • http://zdsshop.top/67829491405fjm7a.pdfIn PDF document text
    • https://zomujowedava.weebly.com/uploads/1/3/4/6/134629266/7936032.pdfIn PDF document text
    • http://bowanizi.22web.org/tunilavajanuvukiroxijule.pdfIn PDF document text
    • https://fukagopesuzidad.weebly.com/uploads/1/3/1/3/131381553/8fb7256f.pdfIn PDF document text
    • http://keepsufi.space/nogipidudexuj2gtfg.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/CtgeAkE/xujugu.pdfIn PDF document text
    • https://cdn.sqhk.co/repudodo/ThjEgfB/23718507793.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jidojig.epizy.com/kendo_mvc_window_content_template.pdfIn PDF document text
    • https://02aee961-309f-4c8b-9790-08f12c26706e.filesusr.com/ugd/8321db_ca8acfa6b1c74bc6bdc714c052c25c31.pdf?index=trueIn PDF document text
    • http://wegepuzil.epizy.com/chemistry_test_questions_and_answers.pdfIn PDF document text
    • https://7ec9ed57-df89-401a-953b-45744c150cee.filesusr.com/ugd/6e3131_3f9867c6105149e68e625060a4b18bc0.pdf?index=trueIn PDF document text
    • https://8a088b33-2c08-4a8c-8d17-3b052cb5145e.filesusr.com/ugd/94e5ef_0f6a7492fd97426f8340d834f1c87b02.pdf?index=trueIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_f5e30d0a95714b6393acc82b7ad348d3.pdf?index=trueIn PDF document text
    • https://39c10a3a-92c6-412a-a1bb-b8a1fc48fbc4.filesusr.com/ugd/259099_112fe0d2576f470b92f0888d5eab36fa.pdf?index=trueIn PDF document text
    • http://zesivigodexewig.epizy.com/kopazosepipenejelaw.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEA 5456 bytes
SHA-256: ca17a0bf2aeb37e6a4d3ffbb37c03f6bd4e13cebb1b20ac7c447db72db7acbed
font_01_sfnt_off00010066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10066 11420 bytes
SHA-256: c10220f2434ddace97b19eb3538c34477684a88c0a7c8cd2dd29caf9acc5374b

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