Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cc9ecead9a64c41…

MALICIOUS

PDF

80.4 KB Created: 2021-04-01 17:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 15f55c300ed0a2fa73fda931e330a6fc SHA-1: 57eb481092218548887eb7d0b8599d5f0656c89a SHA-256: 3cc9ecead9a64c41a0c4c7c092cf00bb2cce290e2e2f82f98a7cfe27e365bf47
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous external links, many hosted on disposable domains, suggesting a link farm or redirection mechanism to deliver a malicious payload. The document body, though partially corrupted, contains a URL that appears to be a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://kuzutuzo.ru/strik?utm_term=what+are+the+seven+days+of+the+week+in+french PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424645/normal_601bc36d553b7.pdfIn PDF document text
    • http://berabujadew.22web.org/animal_jam_on_computer.pdfIn PDF document text
    • https://cdn.sqhk.co/rodisukipi/fvzGGjd/50930949172.pdfIn PDF document text
    • https://kuzeloxowew.weebly.com/uploads/1/3/4/3/134330257/todubude.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_60121923f2ea0.pdfIn PDF document text
    • https://cdn.sqhk.co/lubometusoz/jEpJOyD/fuxafuvaluxisefofamerasuk.pdfIn PDF document text
    • https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/533b6f229c56.pdfIn PDF document text
    • https://dipakinujudisil.weebly.com/uploads/1/3/4/4/134468351/8343840.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/gdshivM/nda_exam_2020_syllabus.pdfIn PDF document text
    • https://radasezase.weebly.com/uploads/1/3/4/6/134643415/436dd86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418764/normal_5fe5eddc8f479.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_6065bf7811851.pdfIn PDF document text
    • https://juwomazitebuden.weebly.com/uploads/1/3/1/4/131414743/2c05b5be0ab607.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377101/normal_603c5af791110.pdfIn PDF document text
    • http://pugaxosojusi.22web.org/what_order_do_you_watch_divergent.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xenamufilas.rf.gd/gazakowidivazineko.pdfIn PDF document text
    • http://vapanuwivodoj.epizy.com/97256814548.pdfIn PDF document text
    • http://rukateridexak.rf.gd/rixiruritem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6da9acad-301d-45bc-9ede-74de1540cf21/voboxasemezazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/938caedb-f0d7-4612-973a-9762cabecd06/shop_vac_replacement_hose_walmart.pdfIn PDF document text
    • http://rosaboz.rf.gd/sonamagunowowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a4572ec-4d29-4f50-a024-c4b457ba7cfd/xamigoli.pdfIn PDF document text
    • http://figadadir.rf.gd/sebod.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_off0000f9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AC 5408 bytes
SHA-256: a94dc5328547f36815f29def9e5b66ed822aada9fee8fd838ca031d435d1b4d9
font_01_sfnt_off00010c2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2E 11888 bytes
SHA-256: 7fd161f6bdd39add36c0c5488fec85af63ea7fc01ce3d0935cbb5d252abd33e7

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