Malicious PDF — malware analysis report

Static analysis result for SHA-256 163e0a46dadfc068…

MALICIOUS

PDF

48.2 KB Created: 2021-06-03 05:03:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 631b7834ab91b9e5df0569984a9bf39a SHA-1: 0df12d311c3ce85b1bf7647023d2c158e5b2d8ce SHA-256: 163e0a46dadfc068d9b91f3d57c8dd0afad55373e0ee9adaf4c494166e00d654
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free Robux'. The primary lure appears to be a fake generator or hack, designed to entice users to click through to a malicious website. The document also contains a callback lure, suggesting a potential for further social engineering or scamming tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.online/app/431946152/earn-robux-today-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/fbchampion_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005077.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5077 26912 bytes
SHA-256: 141351f9d35532c7bd7cf28a64a112f22b3a991ebe5df5e833576f939caa5592
font_01_sfnt_off00008ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC7 3044 bytes
SHA-256: fd3301e8e92dbd5e080c8b37443a41170f109edd539f23a54c5300ce49d59f96
font_02_sfnt_off00009933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9933 18432 bytes
SHA-256: 50fc1adeb895ae30588f73a493889120d8bf728fc3821c38df9289c33b75de2a

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