Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0f7e1fb56639b3…

MALICIOUS

PDF

36.0 KB Created: 2021-07-01 15:58:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0f36b262f89a5de270cf16056ab5ba2e SHA-1: 6a5ba5d5ac5e609a92d31f5d67732a6216cd4e4a SHA-256: 0f0f7e1fb56639b3eaa0b8dcefbf91964f6ba5d3d9a413b04870744375450b09
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors that are flagged as malicious, specifically advertising 'free generators' and 'game hacks' for popular games. The document body and embedded URLs strongly suggest a social engineering lure to trick users into visiting malicious websites, likely for further malware delivery or phishing. No scripts were extracted from this sample, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/youtube-roblox-how-get-free-animation-game-hack In PDF document text
    • http://digilib-pps.unja.ac.id/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/hack-roblox-passwords-free_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/pubg-uc-pakistan_GM1330123889.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-promo-code-for-2-million-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-hack-cheat-generator-coins-and-spins-unlimited_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/console-developer-tools-robux-free_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-promo-codes-october-2021_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/hacking-for-account-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-appcom_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-sword-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-free-spins-through-coin-pop_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/omfg-check-cashes-v3-speed-hack-working-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/best-free-roblox-skin_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-the-legend-of-the-bone-sword-rpg-hack-script_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-use-cheat-engine-on-roblox-without-shutdown-2021_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_off000032a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32A0 22928 bytes
SHA-256: f630d1a6ed5c76cfde3f812f8982b398775c58384e08059be048438b5c4a1a05
font_01_sfnt_off00006663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6663 19600 bytes
SHA-256: 651d1bf0ba3fb715a813a224f6cadbcbe0b8d20ab2ef47568af6e478c9c460e2

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