Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f376645e5c07ce4…

MALICIOUS

PDF

34.3 KB Created: 2021-07-09 04:10:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ef09d775c489cafa90e0e9b429de2423 SHA-1: 7b784b16d10929c0748a4ae8956adc0528219364 SHA-256: 2f376645e5c07ce40a844cfefea798e08d75c2f0c9aad7bd873c2a9efd00a294
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://netcdn.tw/app/406889139/hack-master-coin-pc-game-hack PDF link annotation
    • http://perpustakaan.idia.ac.id/repository/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-black-wings-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/cheat-intuable-roblox-mad-city_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-robux-hack-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-get-free-items-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-trolling_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-spins-1701-20_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/cheat-codes-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-gold_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/como-tener-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000030ba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30BA 22812 bytes
SHA-256: 54d35fc2774cb2448014f2ef5e3be2e0cb0452e924e72ca37e6c25f59451f561
font_01_sfnt_off000063eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63EB 18160 bytes
SHA-256: 7bf7a713ea91c310d3ed9cfc8f1621760a7c258ca2549003d87af9448f5c7a9d

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