Malicious PDF — malware analysis report

Static analysis result for SHA-256 693579c13ef0a01b…

MALICIOUS

PDF

91.3 KB Created: 2021-05-17 09:40:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5984662c31e1043cfc28051a9c2a4c0c SHA-1: c06a1bd56da68dc3405b2934146278b704297208 SHA-256: 693579c13ef0a01bfdcf5c7ece4a14ed0373b640dbbc5fce8f0210fb14467d92
166 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It uses a password-protected-archive 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 0.9997

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://seumenha.ru/strik?utm_term=brother+6490cw+wireless+setup PDF link annotation
    • https://cdn.sqhk.co/tokofape/cbPAyij/laxipogiwetajo.pdfIn PDF document text
    • http://uscreditinquiry.info/clasificacion_del_derecho_mercantil_objetivo_y_subjetivoinbmp.pdfIn PDF document text
    • https://cdn.sqhk.co/nepusoliweda/hfCtDRx/kobini.pdfIn PDF document text
    • http://dikoxikikalonib.scienceontheweb.net/ms_dos_commands_list_with_examples.pdfIn PDF document text
    • https://cdn.sqhk.co/fifenije/igmhZff/ratorutovakub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472188/normal_60222136ac9b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407085/normal_600398613f1c4.pdfIn PDF document text
    • http://servisvds.ru/28315843653wkcq1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453741/normal_5ffe1da83e4c3.pdfIn PDF document text
    • http://bestsaleshopin.xyz/troll_face_video_games_unblockednl1p1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421215/normal_602b37ea2e26c.pdfIn PDF document text
    • http://hempmap.ru/2004_fleetwood_bayside_pop_up_camper84sok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/ce8931b8-455d-4f73-a6da-4493cbbeb1a3/harley_davidson_sportster_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e5b4e0a-1d53-49e3-a80d-9824070c52cb/lg_inverter_direct_drive_top_loader_washing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/628e9489-2bf8-4824-b443-98660beb675e/what_can_i_do_with_a_computer_networking_degree.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cb20f2f-d755-42df-a660-75ca50b3368a/husqvarna_chainsaw_450_price.pdfIn PDF document text
    • http://kubowulurarekij.myartsonline.com/19237287387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4c03f44-0abb-4b3d-9653-6801d29f1c5b/2020_ssr_125_weight_limit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c08cd057-5bf0-4d74-b664-fdb0af085c69/how_to_factory_reset_dell_inspiron_e1505.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A5 5268 bytes
SHA-256: a57e48da6299375d9ca089921d07555ed27ee6e325d5980cd744c76b9ee2f0ff
font_01_sfnt_off000128c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C2 12636 bytes
SHA-256: 441a4b30131be46c22dbc220dd2d0e86f5773eb661861fd1430d57b18df1ed1f
font_02_sfnt_off0001522d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1522D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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