Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97e3f1dc872f74b…

MALICIOUS

PDF

77.9 KB Created: 2021-03-19 08:40:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 90a8eab65eeaa8462dd2b258b28e551d SHA-1: 9481fa0786248c15daaebdf4c36082c90533d351 SHA-256: f97e3f1dc872f74be292dbf5adfbab60aab43f712ee65588ef22009d841a58ce
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://fokemale.ru/award?keyword=auditoria+contable+pdf+peru PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417670/normal_601ae179de7ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472763/normal_5fd7bddd922e1.pdfIn PDF document text
    • http://bukudix.getenjoyment.net/gubogosemoginu.pdfIn PDF document text
    • http://gidujoluj.mypressonline.com/chinese_olympic_weightlifting_program.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460950/normal_5ff850250efa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368245/normal_5fdc5d14025f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489846/normal_601b6436f414a.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/maytag_quiet_series_300_no_water.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385214/normal_60076eddd058e.pdfIn PDF document text
    • http://brumbum6.xyz/49456620019xk6ga.pdfIn PDF document text
    • http://quickstore.pro/83736495780g3yg8.pdfIn PDF document text
    • http://nopuvobetag.mygamesonline.org/lasers_and_feelings.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/iihhiev/depujus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420905/normal_603effc06f054.pdfIn PDF document text
    • https://cdn.sqhk.co/konafomaz/c6jdha2/telasirufedo.pdfIn PDF document text
    • https://cdn.sqhk.co/puzadowoke/dobTTFm/purojigove.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450040/normal_604ed0de1583f.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/Kgfgg7O/78189666728.pdfIn PDF document text
    • http://idealica-columbia.site/gogelg77b5.pdfIn PDF document text
    • http://jewogipuwivi.medianewsonline.com/zogananikaxudejubivexovu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480399/normal_5ff208150ba77.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/eLdp7fH/fejumuxep.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/difference_folk_and_pop_cultureuok95.pdfIn PDF document text
    • http://rasipafus.getenjoyment.net/13869075251.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kifesafijupesob.onlinewebshop.net/74310409339.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_off0000eea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA5 5100 bytes
SHA-256: 5a2ea0d8422dcc26c59e85a2ef99314824be86fc4d8aa3c77a9b16ba0ea09701
font_01_sfnt_off0001000d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000D 12556 bytes
SHA-256: 25670ebf2012e00ae7dbd758d9376affc63ab4ee9bae0cb80b13ae20bbe92dd1

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