Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7710209083fc4f8…

MALICIOUS

PDF

44.9 KB Created: 2021-06-04 02:42:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8e9632cdd23eb1a4699aec7c6a99adf1 SHA-1: a4f5faa9b7911c068cc2a26c353232bccb218a40 SHA-256: c7710209083fc4f876a91aa1104ad5fdff7e0886f8aa1a2000b02a824d1a593f
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 0.9865

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 https://netcdn.online/app/431946152/free-robux-without-doing-anything-game-hack PDF link annotation
    • http://perpus.masda.ac.id/repository/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/open-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-app-hacks_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/daily-spin_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/robuxfree-con_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-do-you-get-roblox-for-free_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_004_off00004db9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DB9 27404 bytes
SHA-256: df4c2acf5d75e20271db4c584f6ec0faf14e6da797d1bafd12df55e698ce288f
font_01_sfnt_off000089e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89E0 19240 bytes
SHA-256: e1e4d521198b5ef2bb2d2ba3e061f6fd747e7988b39df69dcb6ecbaf810b6a5c

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