Malicious PDF — malware analysis report

Static analysis result for SHA-256 231bdd131beab7f1…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 01:25:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 56a624717089abd5cee0b7bbe8ab1dc0 SHA-1: 564d7a5c888be43b148aa0c59381c7e458390228 SHA-256: 231bdd131beab7f126ddb45c98cd40c2a987a74b36152efeaef9f9e10515759b
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link to a 'game hack' generator, a common lure for malware distribution or phishing. The document body and heuristics confirm this redirection attempt. While no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to trick the user into downloading a payload or visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/get-free-spins-on-coin-master-game-hack PDF link annotation
    • http://library.stipjakarta.ac.id/etd/repository/how-to-get-free-robux-on-roblox-in-2021-pyckel_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-best-games-to-hack_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-btools-hack-2021-download_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/robux-in_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-google-chrome-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/level-coin_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-hack-favorites-on-game-roblox_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/hack-no-problem-with-download-roblox_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/live-free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-one-piece-roblox-character_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-robux-hack-no-survey-no-password-for-real_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-robux-no-waiting_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/robux-redeem_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/apps-that-actually-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-hack-free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-elemental-battlegrounds-hack-diamonds_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/cute-free-stuff-on-roblox_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_off0000328e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x328E 22756 bytes
SHA-256: 1de51749d779485d0073b082bbb612aea1bd9424fceccd680d6df9f2ebad6623
font_01_sfnt_off0000655c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x655C 18176 bytes
SHA-256: c16df4cb6866c2276686c5aaa4a0cb78e61d49506a44cfdb7663fe8f5aebf96b

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