Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8dc0cb19b83ea3c…

MALICIOUS

PDF

69.0 KB Created: 2021-02-05 17:09:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: aa17778916d47189b394d2dc685be016 SHA-1: 9db733e7e72d53f0407c5c0b78c2cc8150b3718b SHA-256: a8dc0cb19b83ea3c0c6a4c75472bdcccde0b1eff25b82695a5df2e118ff0e5a4
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains a lure to install a browser extension or update, a common social engineering tactic for malware delivery. It also includes an external URI pointing to a suspicious domain, likely for payload delivery or C2 communication. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://leonvi.ru/123?utm_term=highline+college+canvas PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475570/normal_5fea296a5bca3.pdfIn PDF document text
    • http://dovogonusiru.iblogger.org/metoxulimoxikonidunaxexeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426073/normal_5fd9e74ea311a.pdfIn PDF document text
    • http://kernig.store/writing_idiomatic_pythonutona.pdfIn PDF document text
    • https://xoxisutebigag.weebly.com/uploads/1/3/1/4/131453062/binomediwe_pekurote_wasoji_noloz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483623/normal_60057fc3e4304.pdfIn PDF document text
    • http://dmgameplan.com/wefakir95mhy.pdfIn PDF document text
    • https://mawetifatine.weebly.com/uploads/1/3/2/6/132683292/barav_pemafedadu_maxizirezivaker.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500667/normal_5fe428e4af41a.pdfIn PDF document text
    • http://ritual-venki.online/lemipepitizebef1ecx.pdfIn PDF document text
    • http://betflixguvenilirmi.com/ladukewivoridewecivv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/ammi_ammi_ji_viral_video_link.pdfIn PDF document text
    • http://buwomonemagup.epizy.com/tepurujovulanubavoke.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/kizominizesowulifo.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/antigua_and_barbuda_passport_form_under_16.pdfIn PDF document text
    • http://folujas.epizy.com/99399546887.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/doxology_hymn_sheet_music.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_off0000d09a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD09A 4984 bytes
SHA-256: c64869d17b6c4f26a7e882a656979f8b9bd75d938d0788b5546927b716089501
font_01_sfnt_off0000e19a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19A 11016 bytes
SHA-256: 9a854041c777b71c8953076d61005158bf0b564dcbc23d4c4d5c99f8cd188aba

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