Malicious PDF — malware analysis report

Static analysis result for SHA-256 4df39589f8667b12…

MALICIOUS

PDF

82.7 KB Created: 2021-03-04 23:22:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: da5d5fe2280bf207d2d109af937c13d1 SHA-1: b3d7dcce0d086e384b1cdb4f953edb09d61b797c SHA-256: 4df39589f8667b1268106a21e9d25203abdae3d29f7f9a4470a0bec9678e0ea8
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a clipboard-command (paste-and-run) lure. 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 0.9998

Heuristics 6

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/123?utm_term=new+macbook+user+guide PDF link annotation
    • https://tevaxuxelajuri.weebly.com/uploads/1/3/2/7/132712575/xosiser_sopasibidusos_nitil_xepinusodod.pdfIn PDF document text
    • https://setovejuno.weebly.com/uploads/1/3/2/6/132682792/dad75a.pdfIn PDF document text
    • https://dopovubejaxow.weebly.com/uploads/1/3/4/0/134017692/makafuzudivu.pdfIn PDF document text
    • https://cdn.sqhk.co/jetobatu/MzKktgf/linux_command_library.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368237/normal_5fcfefbc9f2af.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/uif2nhb/save_the_planet_car_stickers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387427/normal_600825bb0f45c.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/2fb09e69-d2e6-4ff3-b23f-a767df28db66/paint.net_for_mac_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/21377719960.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/amounts_owed_to_creditors_are_reported_as.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94c133b6-7fcc-404a-92ba-39fc5f4a74d6/what_are_some_self_destructive_behaviors.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/cetoacidosis_diabetica_en_perros.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/searchview_android_example_github.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c8915fc-bb0b-4f18-a450-da9077ef5b28/fikeserudasisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b9bd22a-6ac6-40e1-86ac-4ff73a974fdc/forgotten_realms_wiki_elf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d749b69c-4735-4634-8911-484ec4585a13/porinuniwugikopimafela.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_off000107e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E0 5492 bytes
SHA-256: cd0de91e3405d6d59e6b1b711123c588ecaafbe1721e80b42e00602d7d93c343
font_01_sfnt_off00011a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8A 10392 bytes
SHA-256: 3a97b7d0f1ad2fd777b475a78846005b53663935f977f2c8d2684a61ee35c64b

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