Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d4266ac9698a95d…

MALICIOUS

PDF

79.7 KB Created: 2021-05-11 16:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 687d9c50d2b0b0fddf4ce0d00e8fb692 SHA-1: 31a123de7aea3fa03a7df216ef9e86048de729b6 SHA-256: 3d4266ac9698a95d16fb659e26b850a7b77243f8ef36059f6f4abadca2e7f0e8
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'jacksth.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to reference product details, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=h20+x5+steam+mop+microfiber+pads
    • https://cdn.sqhk.co/meletadugox/TcifhZe/the_joker_rising_full_movie.pdf
    • https://cdn.sqhk.co/noviraxat/ZOChaVi/alto_recorder_sheet_music_for_beginners.pdf
    • http://x-bionic.shop/jardcs_paper_templateoueme.pdf
    • http://armlur.space/45298197413jh7eh.pdf
    • https://static.s123-cdn-static.com/uploads/4419626/normal_5fcf741a09a44.pdf
    • http://azorocheat5.xyz/98793943757dg1vv.pdf
    • https://cdn.sqhk.co/risevejuxik/heThhop/25815057253.pdf
    • http://erogan-columbia.site/why_does_my_samsung_tablet_keep_turning_on_and_offzpkcj.pdf
    • http://livecopyrightverification.com/myles_munroe_books_on_marriagel525p.pdf
    • https://cdn.sqhk.co/ributexovek/Gibzhf1/fonanupeduroloviwis.pdf
    • https://cdn.sqhk.co/tefupudoma/7GaQjdu/loopback_plug_purpose.pdf
    • https://cdn.sqhk.co/luwesefizi/5Ahczih/vukidin.pdf
    • https://cdn.sqhk.co/kinuneba/ghighgf/61392232402.pdf
    • https://cdn.sqhk.co/sipobufiw/dgfWChe/relinimozasimijojakun.pdf
    • https://cdn.sqhk.co/zujumatatub/fijgjeg/kapigovusuziwemoz.pdf
    • https://static.s123-cdn-static.com/uploads/4422168/normal_5feb081330ce3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jefazaxal/what_does_an_itchy_beauty_mark_mean.pdf
    • https://uploads.strikinglycdn.com/files/fccca418-2564-465c-9ef9-d65e9e7c55a6/89118525481.pdf
    • https://s3.amazonaws.com/mizeteb/mercedes_e320_service_egr_valve_location.pdf
    • https://s3.amazonaws.com/venunamazozuzo/redexumozedamanazasado.pdf
    • https://uploads.strikinglycdn.com/files/c1706cbf-110b-4850-8a3c-e5944378919f/93911077114.pdf
    • https://s3.amazonaws.com/bajapovogam/why_is_it_important_to_write_essays.pdf
    • https://s3.amazonaws.com/xesigeze/around_the_world_in_80_days_book_summary.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f52a.bin
93165e2371b2fe140cb20c1bde874f097fe767f2ee4bfa776eca85a2901d99f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF52A 5836 bytes
font_01_sfnt_off000108ee.bin
eedb7aeb0d6baba05304bfbbd2dbd26ac3b603e3a834b3302193e8c15f13308b
pdf-font-stream PDF embedded font (sfnt) at offset 0x108EE 11536 bytes