Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a2e07207c02c84b…

MALICIOUS

PDF

47.2 KB Created: 2021-06-11 09:43:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 21f51caf6def8784b0b5d80f4152a4b1 SHA-1: 430e778b0b833c29af7a9cca2f5fa3ca53696e2d SHA-256: 6a2e07207c02c84b563d244629a5b0b6796f5d3336b3623ac78ab51e04795c20
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free currency, directing users to a known malicious redirector. The embedded URL is `https://netcdn.tw/app/431946152/hack-para-tener-robux-gratis-2021-game-hack`, which is associated with malicious redirector infrastructure. This suggests the document is part of a phishing or scam campaign designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.tw/app/431946152/hack-para-tener-robux-gratis-2021-game-hack In PDF document text
    • http://library.acehresearch.org/repository/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/robux-best_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/irobux-com-redeem_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-codes-2021-june_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/pubg-uc-event_GM1330123889.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/robux-generator-without-human-verification_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_off00005447.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5447 28196 bytes
SHA-256: 429d8ed76f0700ac08694cb121071579ddb1685f2c46d2dd6982c1c4c869352e
font_01_sfnt_off000093c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93C3 19028 bytes
SHA-256: a15efbaa5aadd86935f912d856e22e2781e7c9f15209846ab46ecb5b2924ac6b

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