Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dfb7c6f1489f502…

MALICIOUS

PDF

32.6 KB Created: 2021-07-04 21:29:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 07578ef342acbd58a0e65b1fbf6551ac SHA-1: eebb3a0707b030f9b609ec8cd278e3423ae32145 SHA-256: 3dfb7c6f1489f502d2afe547e689f5ef9a1ecfe5bb620a3c9c51707654c7f98c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on luring users with game-related hacks and generators, specifically for Robux. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates a malicious intent to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the nature of the lures and the embedded URLs suggest a phishing or scam attempt, likely leading to a secondary payload or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/431946152/robux-sign-game-hack PDF link annotation
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-hub-free-vip-server_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-free-online_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-raid-hack_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/pastebin-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-do-you-hack-minecraft_GM479516143.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_001_off000029d0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x29D0 22416 bytes
SHA-256: de48d87b9dae132f4579558282715d15da18051fa8f9e57194f64ae3c5d0a4b2
font_01_sfnt_off00005bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB6 18672 bytes
SHA-256: b08045f0ef1d16ee57e5480d01b9e5b14967ade0d8d990bfafc75919adf3db5b

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