Malicious PDF — malware analysis report

Static analysis result for SHA-256 16c1352b3c4e173b…

MALICIOUS

PDF

43.0 KB Created: 2021-05-11 18:48:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 07dd4dd4e3d08f00020a2658be87b3f4 SHA-1: 5ff5b6bc84b930acfb1a6ee4198d62c5bf197d96 SHA-256: 16c1352b3c4e173b73b114bcea375186d6f2aed358ceeda1e87737ab804fbd34
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and free generators, directing users to a suspicious URL. This strongly suggests a social engineering tactic to entice users into downloading potentially malicious content or visiting a phishing site. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence indicate a malicious intent, likely to facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/479516143/minecraft-multiplayer-free-game-hack PDF link annotation
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spins-link-2021-twitter_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/grabpoints-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-human-verification_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
stream_003_off00004d07.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D07 25124 bytes
SHA-256: b93260989f3d5bfea88ab163f169aecf4cfaca4ed0aa1de1e0f427d5609903c7
font_01_sfnt_off0000868c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x868C 18136 bytes
SHA-256: 22c65de64af2721f6fc37241b86838ece151de043079d0e804f5da14bd34918b

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