Malicious PDF — malware analysis report

Static analysis result for SHA-256 3555a51f27924cc4…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 16:56:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 22ff8975f74542962df0a94789bd8534 SHA-1: 28c179df02db456eb6eef3e648715d02e6848239 SHA-256: 3555a51f27924cc4061edd53d4ae5ea1307035c5ca7d99ad2897233b0f6457b7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'Coin Master Free Spin Today' and various Roblox hacks. The primary lure appears to be a game hack generator, which is a common social engineering tactic to trick users into visiting malicious sites. The document's structure and embedded URLs strongly suggest it is designed to lead users to potentially harmful content or further malware downloads.

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.tw/app/406889139/coin-master-free-spin-today-game-hack In PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/booga-booga-in-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/games-in-roblox-that-will-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/como-tener-los-hacks-de-xonnkek-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-robux-on-ipad-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-instantly-no-cache_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/robux-extreme-hack-code_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/hack-para-roblox-de-robux-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/hacker-defense-system-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/dailyrobux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-counter-blox-free-skins_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/the-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-coin-master-s_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-entrepreneur-tycoon-cheats_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_off000031c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C2 23132 bytes
SHA-256: 0c7ea0752cf6542dd4a3aa013c64f95960410dae1a51bd184cabe67f92ee431a
font_01_sfnt_off000065d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D0 18528 bytes
SHA-256: 611292c7b78d9aef83f236a5f61e8588922333099173db31565d3b831f2ee55a

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