Malicious PDF — malware analysis report

Static analysis result for SHA-256 553a4b2d38b4d016…

MALICIOUS

PDF

43.9 KB Created: 2021-05-17 04:04:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8e366858d0a1c4d02aed79878ed60a25 SHA-1: c9993e9bfa854bfc9a4b2d854d37af32eb429ea2 SHA-256: 553a4b2d38b4d0166cee10698a598fc2c144aa804b139396504a774f2933c3d4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure related to game hacks and free currency, strongly suggesting a phishing or scam attempt. The primary link directs to a URL associated with game hacking generators. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/406889139/how-do-you-earn-free-coins-for-coin-master-game-hack PDF link annotation
    • http://prazdnik-kzn.ru/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/free-diamonds-coin-master_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/how-to-hack-coin-master-game-ios_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004755.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4755 24452 bytes
SHA-256: 85bad90f16a5ecc4defbf3fd3d890a4722a80ccb53bab30d88687d2e04f665ab
font_01_sfnt_off00007f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F02 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000088ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88ED 18344 bytes
SHA-256: 5806cda21877127dbf589a3d7d7b31f937fe3ba1f3a16df07ebea42887c1a658