Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aa09d940a35b247…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 02:30:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a602855d0e748379933a9ac584bb37ae SHA-1: bc0ded198df40b2443a4b80153466bc22acea844 SHA-256: 1aa09d940a35b2471f67d214f653d2e9b2c59a84267db091690d8e1975a2a288
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/free-bling-bling-card-coin-master-game-hack PDF link annotation
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-robux-without-having-to-do-anything_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-make-custom-api-for-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-fans-on-tiktok_GM835599320.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/hack-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-hack-roblox-accounts-to-do-good-stuff_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-20219-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-look-cool-on-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-speen-hack_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/egg-finder-hacks-for-roblox-dragon-adventures_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/muscle-simulater-roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/prison-royale-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.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_off00003160.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3160 23004 bytes
SHA-256: ee0a18acd8d4ebed5e44c1e73b564a1752c35b8a2f9f9113baea0cd31b908e02
font_01_sfnt_off000064d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D6 18464 bytes
SHA-256: 9e525174b91ad41fb891ac7cfc07bd8e8020f7e5e3866fd8c2d53bfbd1eafce6

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