Malicious PDF — malware analysis report

Static analysis result for SHA-256 31486ff1d22a723c…

MALICIOUS

PDF

70.3 KB Created: 2021-01-26 00:53:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: ac578966c64269a13ea1e86a5beff7fb SHA-1: 6a2f96ca1d1ed1c5fb0edefad05841991f90eb91 SHA-256: 31486ff1d22a723c96523dce5ce31361822b1c3ded42b10f47297c9b59ebf50a
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'baarspo.ru', which is likely part of a phishing or malware distribution scheme. The PDF structure and embedded URLs suggest an attempt to trick the user into downloading or interacting with malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/123?utm_term=valve+keeper+tool+harbor+freight PDF link annotation
    • http://paypallsecurity.com/vulcan_pop_bubble_shooterpfs3n.pdfIn PDF document text
    • http://trenketo.buzz/pac_man_fever_album_downloadev18m.pdfIn PDF document text
    • http://vkysnaya-eda.site/jonujudisamifezo8pg2b.pdfIn PDF document text
    • http://webmastervlad.ru/repulsed_synonym_adjective2dun4.pdfIn PDF document text
    • https://cdn.sqhk.co/raxinosi/jfhhXjb/wogunonudofafokunirax.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/nPhjEhi/lofezi.pdfIn PDF document text
    • http://telgrm.site/attendance_taker_zoom13i3o.pdfIn PDF document text
    • http://helpforteam.com/56507430164hrndp.pdfIn PDF document text
    • http://liketime.online/shake_shack_stocktonbcxw6.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/lunadutafab2d2a.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/xukirizugukugi/spoken_english_book.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/80701418001.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/bridgit_mendler_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/jesus_loves_me_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/linux_bash_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/50440206073.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/jifotaxamoxudofububu.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/bifatavelevezomika.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_off0000d65d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD65D 5216 bytes
SHA-256: 9551b0a9cc31ea32cc64523997cb99ff4cc3e0f01ee024588a5b2ae286544533
font_01_sfnt_off0000e821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE821 10536 bytes
SHA-256: 0f3973e5796c3e0f0319109c7171cc5c4c7e8f560f749372eb7957881c56bb00

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