Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d4a8a1d0307363…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 09:56:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 018947d834893fc1267febb5aa81498a SHA-1: 1707f89cf3e3e187a432530d0e0b6a2b6c7d2f4f SHA-256: d1d4a8a1d03073630f3a38327a09f2fad96639fc75784ee6dcdadef2e10f66a6
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/coin-master-daily-free-spins-link-today-2021-game-hack PDF link annotation
    • http://perpus.stmik-im.ac.id/repository/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/descargar-hack-de-roblox-para-pc_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-money-cheats-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-jailbreak-cheats-pc_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-unused-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-huge-field-fre_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-exploit-roblox-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-traversed-wall-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-cheat-for-brick-bronze-all-pokemon_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-codes-2021-december_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/cheat-engine-65-download-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/2021-hacks-for-da-hood-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/hackear-coin-master-android_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-hackers-tshirts-images_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-giveaway-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_off00002f99.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F99 23068 bytes
SHA-256: f6015c4ccf78950946db85fda0f4da2efdee4869fb28395c8ca2c14ebe8e1042
font_01_sfnt_off00006384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6384 19344 bytes
SHA-256: bda18ad7bc028b2989dfdc10c84b9c87c1dbf0242a88a3a6fbf9217f203e509c

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