Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bb3ffb26e7f2e8c…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 10:26:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 1e8a182b695b7be07a8dda241633ef0b SHA-1: 56560552a63e633e1f956a9fa1cafb30b1898d9d SHA-256: 9bb3ffb26e7f2e8c17d23aa7961bd608bf8a1cc6a45e98c1ce9542c6df6691cd
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-spins-for-coin-master-app-game-hack PDF link annotation
    • http://perpus.masda.ac.id/repository/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-earn-free-robux-on-blox-land_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/console-code-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/robloxs-got-talent-cheat-tuto_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-generator-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/robux-for-surveys_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-free-promocodes_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-pillow-simulator-free-pillows_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/cookies-to-buy-robux-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-a-free-backpack-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/get-free-robux-from-watching-ads_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/moon-active_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/admin-code-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-roblox-characters_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_off00003357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3357 23096 bytes
SHA-256: d530a5bae267b2ef2f31952d06c9f0fe0c55f3ad27925e319f42a98d1bdd132c
font_01_sfnt_off00006752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6752 18176 bytes
SHA-256: 3801bf7a1deb8554b037031e06bdefc56ff30112f6b39d510dbb5cf942fa8267

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