Malicious PDF — malware analysis report

Static analysis result for SHA-256 52eba88d45d7da96…

MALICIOUS

PDF

73.5 KB Created: 2021-04-01 19:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 02ce46a695f4d35354a77a6e59b1eb65 SHA-1: 4a0891a6d09b1197fade776ee11b1e462975bee9 SHA-256: 52eba88d45d7da96b6ce1a47a3c00807f4bf358a4f1dde7ede9aa6794a177eaf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://vilenefex.ru/strik?utm_term=how+to+descale+scotsman+prodigy PDF link annotation
    • http://particulieres-societegenerale.best/pubs_near_chatsworth_roadv76k8.pdfIn PDF document text
    • http://vipimuxatomefi.medianewsonline.com/angle_pair_relationships.pdfIn PDF document text
    • http://masalev.ru/700026272339ih98.pdfIn PDF document text
    • http://difozoxezepi.getenjoyment.net/paradise_lost_book_1_plain_english.pdfIn PDF document text
    • https://cdn.sqhk.co/notenirikev/JHMjfAO/modern_warplanes_sky_fighters_pvp_jet_warfare_apk.pdfIn PDF document text
    • http://rimujitibux.mypressonline.com/66307587485.pdfIn PDF document text
    • http://carluxepaint.site/xokunezetezunugit7phjq.pdfIn PDF document text
    • http://geleostone.online/lemamedagujuxfkmch.pdfIn PDF document text
    • https://cdn.sqhk.co/vizebika/ig7ijNJ/vlogger_go_viral_save_game.pdfIn PDF document text
    • https://cdn.sqhk.co/molivovuki/gjjeRjc/word_finder_anagram_scrabble.pdfIn PDF document text
    • http://boribonabone.mypressonline.com/dsl_technology.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fulazelof/6399869126.pdfIn PDF document text
    • http://sebokegekesuded.atwebpages.com/31017907639.pdfIn PDF document text
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_cd344fd58cdb4741b8f160f4cf99e556.pdf?index=trueIn PDF document text
    • https://aece7fbc-7072-4055-9cfa-29e0da41b620.filesusr.com/ugd/e878fd_4fec7aa55fb2436791071d723bf3f482.pdf?index=trueIn PDF document text
    • https://fc060a1e-8c1d-4b7d-bafd-75f79d4c6355.filesusr.com/ugd/c0a468_9b0a6cd26c854799aac110f66a23e918.pdf?index=trueIn PDF document text
    • https://eb72eaa1-ef55-40a3-a653-f6d21bccf295.filesusr.com/ugd/54913d_2a76907465c14774b688b6b4ec3fbb3d.pdf?index=trueIn PDF document text
    • https://e19809cf-df80-48c1-9975-8599b001ad7a.filesusr.com/ugd/062cdf_3197023d7bc043afb182deb9d8d6c431.pdf?index=trueIn PDF document text
    • http://salajire.onlinewebshop.net/cerebyx_davis.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/xuwozo.pdfIn PDF document text
    • http://lufevexos.atwebpages.com/lajovokudegidanuj.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_off0000e1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C8 5548 bytes
SHA-256: bfb4972d6d84ab4f36d2a74090d49378527a09f051eb964d171a9bc5e321d958
font_01_sfnt_off0000f4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A6 10428 bytes
SHA-256: f8c5eef9f65c4459167498a503e87081f57999633feecfac6e11635e7b1ac7e5

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