Malicious PDF — malware analysis report

Static analysis result for SHA-256 2727bdf3fe13b5b0…

MALICIOUS

PDF

33.6 KB Created: 2021-07-09 04:49:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 422aa7771edda972dc8d27e508f8ebad SHA-1: 80ef2a81506b94653c0413fe00f9163601e0fb1b SHA-256: 2727bdf3fe13b5b0122c1c43f781d5d5fa88d463f435cb29696b85750c08efbb
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/479516143/minecraft-pocket-edition-free-apk-game-hack PDF link annotation
    • https://library.sttbandung.ac.id/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-get-free-robux-on-ipad-no-verification_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-jacket-free_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-get-free-robux-without-inspect_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-hack-facebook_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/simple-roblox-hack-hp_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-get-fre-robux-2021-not-fake-ral-2021_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-mad-games-aimbot-hack_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-script-hack_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_off000030e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E3 21440 bytes
SHA-256: fdaa868493f767527440e593baacfbbfed009b5f21e1c341f102a3075dfd255a
font_01_sfnt_off00005f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7F 18672 bytes
SHA-256: 3e2f23e0331418b6b8b756e9ab8a4e4cea054b51d170e767955415f920785c5a

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