Malicious PDF — malware analysis report

Static analysis result for SHA-256 75080d282f686944…

MALICIOUS

PDF

79.8 KB Created: 2021-06-05 13:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2e78a077d56208dbfa2b97c4deaee121 SHA-1: 1e427c6378a7af5d9e2fbf391f45e7aa26eac223 SHA-256: 75080d282f68694482e9bbb4ff06e0c7e7a4afa5cd41783ec6839fae03167abe
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

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 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.
  • 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
  • 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
  • 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://leonvi.ru/123?utm_term=panasonic+hdtv+1080i+owners+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484097/normal_5fd3887c214a1.pdfIn PDF document text
    • https://liguroxuf.weebly.com/uploads/1/3/4/4/134443360/4070362.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406514/normal_604ecdc15b7c1.pdfIn PDF document text
    • https://vokubopupabilu.weebly.com/uploads/1/3/4/6/134691430/zanisaxotot.pdfIn PDF document text
    • https://vakilonote.weebly.com/uploads/1/3/1/3/131382032/kudijutunigam-vafinapodu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401989/normal_60bb1ce8e2f3e.pdfIn PDF document text
    • https://xofusifusu.weebly.com/uploads/1/3/5/3/135312872/5058839.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383695/normal_606ba2a290277.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/7564a75e-16c7-4b2f-b8a1-4bdd98a59a2a/las_mentiras_de_mis_maestros_libro_completo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0b5c5b5-6463-4a1f-be65-c3ece39e1e39/krk_rokit_rp5g3_5_powered_studio_monitors_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88c99f22-c0aa-4383-829c-718831493ec1/how_many_bookshelves_do_you_need_for_enchanting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3338d514-50ef-419d-b13d-9210da74e098/innova_3020_code_reader.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4405f971-3036-4492-b4ba-539b47d2ef2a/lanurizuribetiluvaseb.pdfIn PDF document text
    • http://mituxap.pbworks.com/w/file/fetch/144661302/sedupinazitixapeguterim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f39d8be-7bf8-45b7-9e0b-c3660aa790fd/67501142987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21014f87-2aa3-4432-acd8-30c505f29412/can_you_refill_an_epson_ink_cartridge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c8a0b3b-83c6-4a83-ad8f-d6e9b22e45ec/teluvake.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/w/file/fetch/144615741/bovumakalute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f18f3929-a79a-4811-89b6-cc6573f523cb/aimpoint_pro_battery_type.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/f/nuwexiwamudukisafelux.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4D 5720 bytes
SHA-256: aef343d6521dc272b8a17e40cf867414d0496444cacedcb1f8cc5f70711d78ca
font_01_sfnt_off00010fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB4 9988 bytes
SHA-256: 2676c7c2fe21343f3b7ce2f77180f90b2601c71a117ffd33d3ab6d36ed03530c