Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e051104bb8b202…

MALICIOUS

PDF

78.8 KB Created: 2021-02-22 12:38:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0c2a7ca74c8389a99e14aeb0aea3c107 SHA-1: d33f5179a38e03c83923e4a5bd66aaf8e7f4d5f1 SHA-256: 10e051104bb8b202b69d00adaece8a9f54b90ebd366c49c018cdfd54966e46c6
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a product name, potentially used as a lure. The presence of external URIs and link farm heuristics indicates an attempt to redirect the user to malicious content.

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
  • 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://jottigo.ru/wix?keyword=audio+technica+at2020+pop+filter PDF link annotation
    • https://lafevisok.weebly.com/uploads/1/3/2/6/132683062/wozisotibizu-bipabazisura-vukatibexixul.pdfIn PDF document text
    • https://mokizafot.weebly.com/uploads/1/3/5/3/135347773/9125084.pdfIn PDF document text
    • https://gemiporelowagi.weebly.com/uploads/1/3/0/7/130775846/lobusil-menem.pdfIn PDF document text
    • http://health2health.online/pusuteparosaxibijerjwewv.pdfIn PDF document text
    • http://bioforcecolumbia.site/gegitapotufolimuvejekhnoj2.pdfIn PDF document text
    • http://fepafotejidug.iblogger.org/badewakotewexiwiker.pdfIn PDF document text
    • http://nakanilo.club/nitone610o1.pdfIn PDF document text
    • http://moshon.space/skyrim_racemenu_error_10f4jxd.pdfIn PDF document text
    • http://lnstagramsupportinfo.com/54581035717dwfw0.pdfIn PDF document text
    • https://nilarekatopa.weebly.com/uploads/1/3/1/1/131163832/3834688.pdfIn PDF document text
    • https://zubefexer.weebly.com/uploads/1/3/1/6/131606337/zixawifubebul-wizazokujejo-lokoleg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jonufinufezo.epizy.com/ajith_songs_free.pdfIn PDF document text
    • http://jalasofumikom.rf.gd/zumipajoxetojekafiputol.pdfIn PDF document text
    • http://xafonabikox.rf.gd/bodyguard_full_movie_hd_1080p_filmywap.pdfIn PDF document text
    • http://nareboveridur.epizy.com/hallelujah_guitar_chords_sheet_music.pdfIn PDF document text
    • http://wexoloxi.rf.gd/sovugilikavefegebes.pdfIn PDF document text
    • http://vamudijikepefos.rf.gd/lufavori.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_off0000f800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF800 5328 bytes
SHA-256: 0541f3ff952bc376c91a2a57f5645f3c71928687a4aff3b77cff8e58949cdb59
font_01_sfnt_off00010a1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1A 10640 bytes
SHA-256: 0f0cd5af17dfb46ea195b4ed1b1e75d4be69170b070c049e8e70c877da486405

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