Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d828e358c27518c…

MALICIOUS

PDF

35.5 KB Created: 2021-07-04 20:38:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6b4885b8016962777bd256b719ba81c3 SHA-1: 2f35f845ad3ae9b0f3889d9cbae31d6c36d250fa SHA-256: 1d828e358c27518cb8be689fc4ea9ba0e91040bc2e91faf030a88556255c7138
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase, directing users to download "game hacks" or "free generators" from external URLs. The primary lure is for Coin Master and Roblox-related cheats. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a social engineering tactic to trick users into visiting malicious sites, likely to download further malware or engage in scams. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/406889139/coin-master-hack-2021-ios-download-game-hack PDF link annotation
    • http://perpus.wdh.ac.id//repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-spawn-models-in-roblox-with-hack_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-attack-hack_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/sonydeveloper-hacking-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/cheat-roblox-vehicle-simulator-money_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/robux-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/ldshadowlady-roblox-someone-hacked-my-acount_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hack-roblox-ropa_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/skywars-hack-roblox-rubis-weaping_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/vehicle-simulator-roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hack-week-2021-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-hack-menu-jailbreak-2021-mayo_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_off00003279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3279 22928 bytes
SHA-256: e4d4d1213256a80175f33acdb5f1bb6b897ba7d6e09ab5797c0475ed8cc5b071
font_01_sfnt_off000065a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A9 18988 bytes
SHA-256: 050b91db1b0ce997d5149ba527f7e1e895cfc1813b762364afa072aec8cf4c9e

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