Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bfb189e275aff92…

MALICIOUS

PDF

96.4 KB Created: 2021-03-27 12:05:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e4ba151301100f567ce06d24822a5fdd SHA-1: e9f409c613c7e3f70c2381a77a188b453e3380e8 SHA-256: 6bfb189e275aff925c94160f65cdd5177089fbce91d3dda631c7ac35fc332d9e
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URIs, with a primary focus on directing users to a suspicious domain for what appears to be a phishing lure related to 'william shakespeare sonnet 116 pdf'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for credential harvesting or further malware delivery. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://mezovuduw.ru/award?keyword=william+shakespeare+sonnet+116+pdf PDF link annotation
    • http://pajelonagij.iblogger.org/59654346109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_600a914737ea1.pdfIn PDF document text
    • http://xasedogamif.mypressonline.com/what_are_the_four_early_river_valley_civilizations.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411691/normal_6021a5b2b0a2c.pdfIn PDF document text
    • http://gipogup.sportsontheweb.net/64227671977.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455907/normal_60025e0b212f3.pdfIn PDF document text
    • http://jepenufi.getenjoyment.net/fozegorurapusomezoluvi.pdfIn PDF document text
    • http://vewefoma.getenjoyment.net/soribum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365583/normal_60055636e91f9.pdfIn PDF document text
    • http://janurikemodowu.iblogger.org/joint_distribution_conditional.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385434/normal_605609f26a61a.pdfIn PDF document text
    • http://norasuzajo.mywebcommunity.org/formal_language_and_automata_theory_books.pdfIn PDF document text
    • http://rejamar.sportsontheweb.net/jarazot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_d83169eb68234b13ad2023dede8c0da6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac215a04-32cf-4920-b65c-f0ae39025c74/bixumenorap.pdfIn PDF document text
    • http://gegilifopom.myartsonline.com/29060230544.pdfIn PDF document text
    • http://sakonolib.rf.gd/samsung_tv_catalogue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9faa10ed-bfa1-4841-a051-921a8081f01a/atualizar_gps_tomtom_go_60.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27b14337-f45d-4644-89c8-30164f2e032f/wahl_magic_cordless_clipper_limited_edition_kit.pdfIn PDF document text
    • https://3cde87c3-25ab-478b-b58d-ba072f1c7540.filesusr.com/ugd/255d97_f1625207070f433da92a6e3ee38256ca.pdf?index=trueIn PDF document text
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_bfac131e5ca0450ea16af0e371b98742.pdf?index=trueIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_25ab095e2dab4ca8ab0ada2f3dbb2b83.pdf?index=trueIn PDF document text
    • http://sulijugofogim.onlinewebshop.net/doorking_1812_parts_list.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/how_to_connect_anker_soundsync_drive.pdfIn PDF document text
    • http://timojodabemisux.myartsonline.com/51248479217.pdfIn PDF document text
    • https://bac325b5-3710-4a60-ba01-c1ac5e8a7650.filesusr.com/ugd/c111de_4a35fff90dbe48a8b238d04ea8d0ca79.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/69e70769-2d13-4065-8395-4c67a10feebb/what_are_the_effects_of_human_activities_on_environment.pdfIn PDF document text
    • http://mevexunimapo.epizy.com/jobujapubefakotezofijuj.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_off00013a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A02 5564 bytes
SHA-256: 2b29c27c5536260258096d7a26f5763b5236308907321ff74ba4634132fb8d14
font_01_sfnt_off00014cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CDA 11640 bytes
SHA-256: 3f06d3f41ecf09015134072da67979f81297db16669877efbe459f3770e16c1d

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