Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0759fae81f254ff…

MALICIOUS

PDF

31.0 KB Created: 2021-07-06 04:22:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7f4e5868179e648ce812d0188019f97b SHA-1: a57c08cabfc0cd39ef3c1ba9b5f51866f20a7b78 SHA-256: b0759fae81f254ff5e588434b89e118f988f55e14599e97b4e1128f1359dda88
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that act as lures for game hacks and in-game currency generators, specifically mentioning PUBG UC and Roblox. The primary link, http://netcdn.tw/app/1330123889/pubg-uc-xda-game-hack, is flagged as a game hack redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9774

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/1330123889/pubg-uc-xda-game-hack PDF link annotation
    • http://elib.upiyptk.ac.id/opac//repository/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/my-roblox-game-was-hacked_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-hack-someone-on-roblox-with-google-chrome_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-code-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-mad-city-hack-blog_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/hacking-script-download-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/no-human-verification_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-free-robux-alot-roblox-game_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/twitter-coin-master-free-spins-link_GM406889139.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_off00002658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2658 21756 bytes
SHA-256: b364a1a17ffb3073806d360a106504042599f6ab2c891cf6697c5ef1e740a338
font_01_sfnt_off000055cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55CF 18528 bytes
SHA-256: 5918287c065465ad0fd4e7e92352988307f7e17b750ff42c9c514e33cf2b2538

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