Malicious PDF — malware analysis report

Static analysis result for SHA-256 79209bdf045fd36c…

MALICIOUS

PDF

33.6 KB Created: 2021-06-28 10:16:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b6a18c5a7b6023690df512a883db2a1b SHA-1: 125fff59c7471be11c13fd6cdb0b7fff58554ba6 SHA-256: 79209bdf045fd36cfe30b6565330baf21cd18786e67624c9cb64ae3f9ca705a5
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.co/app/431946152/fastbucks-free-robux-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/hack-a-roblox-game_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/anarchy-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-hack-roblox-pc_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/pastebin-roblox-account-hack-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-using-eval_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-plus-on-roblox-meepcity-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/sk8-hack-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-hacks-for-star-wars-awakening_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/hacks-for-liberty-city-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-hack-someones-roblox-account-with-google-chrome_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-jailbreak-vip-server-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-hack-music-code-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/inf-jump-medefire-hack-script-for-phone-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-nothing-to-do_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
font_00_sfnt_off00002e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E3A 21768 bytes
SHA-256: ac74e7e2aae8f02efebc37ca929a15d3c1069be9c2096041cd23132b4ea7324d
font_01_sfnt_off00005e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2D 18992 bytes
SHA-256: d818c8a66c303b670fbd0981abb21daa725d748b79585d23d9a69e0ccbe1ba8b

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