Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0a32f9a24469d9…

MALICIOUS

PDF

117.7 KB Created: 2021-02-25 07:39:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a92cc908484f43744fb112d2bf8b9375 SHA-1: 03accbceaac93664c38598ee01ef9e1f90fe8bcb SHA-256: 2d0a32f9a24469d9c34b59abd415a55becdab52caf4e5daba253b5f51653565d
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 threat. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'monopoly property cards explained', which may be part of a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wix?keyword=monopoly+property+cards+explained PDF link annotation
    • http://zinuvudoliku.iblogger.org/46159403447.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/gasomisulafabojuriv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387701/normal_5fe0f6da5936b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488314/normal_601afde8e87bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382790/normal_5fdfcfbb1a49e.pdfIn PDF document text
    • http://drilltech.info/digimon_story_cyber_sleuth_digivolutw25ud.pdfIn PDF document text
    • http://nncucuucuc.space/56982364436d3n69.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/Xhelkme/wazeson.pdfIn PDF document text
    • https://cdn.sqhk.co/nufanusiki/XCQA93u/urban_car_simulator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_600a275daefb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454682/normal_5fee3da5abbcc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390330/normal_5ffd2a274bb27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471690/normal_5fd0fb55cb4f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zotubune.myartsonline.com/how_to_read_an_ebook_on_ipad.pdfIn PDF document text
    • http://difugarulid.epizy.com/xirozu.pdfIn PDF document text
    • http://wulagaw.rf.gd/fediraji.pdfIn PDF document text
    • http://zojasofox.epizy.com/61259512647.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/who_is_the_little_girl_in_pet_sematary.pdfIn PDF document text
    • http://kuwexugebukutim.rf.gd/runes_of_magic_druid_warden_guide.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_off00018ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CE4 5240 bytes
SHA-256: ad3952362ce7795165b0cfffbf40d895842b7e59bec67988e19a64796ccdec3e
font_01_sfnt_off00019edf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19EDF 13304 bytes
SHA-256: be6069f94928bf4a2f651912e5e009d58173553d443797560791ca8b48820879

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