Malicious PDF — malware analysis report

Static analysis result for SHA-256 84f19cd3b3691b47…

MALICIOUS

PDF

78.6 KB Created: 2021-02-20 12:06:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0c0cb61bc013d9f54914cac178bc57a9 SHA-1: 72ea747927f2b75ab2c7af746e01f59f31233962 SHA-256: 84f19cd3b3691b47c6a6f7492c30ac06649312abadf150f2f96badca955b5281
126 Risk Score

Malware Insights

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

This PDF document contains numerous embedded URLs, with a primary focus on redirecting users to external sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/strik?utm_term=what+are+audi+service+intervals PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470843/normal_600df0376ad91.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/giia8ia/tropico_7_news.pdfIn PDF document text
    • http://paripamivawe.iblogger.org/chamara_ranawaka_rajjuruwo_album_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374983/normal_5ff4c0aeea159.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_602dff985cfe0.pdfIn PDF document text
    • http://veronaital.space/azhage_azhage_album_song_mp4_starmusiqn1swg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427499/normal_6001803058695.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463264/normal_5feb9d9f97b21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391896/normal_5fdaba3bae1d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456166/normal_5fd34eade6911.pdfIn PDF document text
    • http://repair-planshetov.ru/76744022682nedc9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472186/normal_5fedf46d93d38.pdfIn PDF document text
    • http://ig-objectionform.com/manual_motosierra_stihl_ms_250_en_espaolyqiuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454281/normal_600fb8621e570.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379859/normal_60052a9d75265.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481278/normal_6003f8d62989b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495846/normal_600f46d28adf3.pdfIn PDF document text
    • http://gufutaca1.xyz/depulopfzzzt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386618/normal_601de9b620156.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/uufhbZo/29819592360.pdfIn PDF document text
    • https://cdn.sqhk.co/zowolanazew/gchgahi/99780404702.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419192/normal_602410cd4c29e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jarebavax.epizy.com/examples_of_spreadsheet_computer_software.pdfIn PDF document text
    • http://ludilisi.epizy.com/able2extract_professional_11.pdfIn PDF document text
    • http://petenufafevut.rf.gd/nuwadopajinud.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_off0000f541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF541 5100 bytes
SHA-256: 7ae346dac323e3df2f9d9078aff7c1fd8e98e1aec80df7b6372be4175f1bf472
font_01_sfnt_off000106a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A6 10764 bytes
SHA-256: 7ba8c9d4291f5d35f3ed1b13181d0bc766c7dcc2591d1fed3f7895d67b30c5ab

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