Malicious PDF — malware analysis report

Static analysis result for SHA-256 a054dd65b049e885…

MALICIOUS

PDF

49.7 KB Created: 2021-06-03 14:08:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 10fec26c377b00c10be74d45a2d8de09 SHA-1: 594a2460d63c1d572746a0dcda35fa46d5fc9ee6 SHA-256: a054dd65b049e885bab1b7115dc91b4f10cddc00f0b4648996862aed7d05a4de
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to websites offering game hacks and generators, a common social engineering tactic. The ML classifier also flagged this PDF as malicious. The primary malicious URL identified is https://netcdn.online/app/406889139/games-like-coin-master-for-free-game-hack, which likely serves as a landing page for a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/406889139/games-like-coin-master-for-free-game-hack PDF link annotation
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/pubg-uc-trick_GM1330123889.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/robux-hack-generator_GM431946152.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_004_off00005625.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5625 28668 bytes
SHA-256: 1e5df0f169a7a0a12ea35a7ab94170c0e12479b6d9e26531e12dd60e8bd9cac9
font_01_sfnt_off0000966e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x966E 2856 bytes
SHA-256: 8a37bc2d056ad0bf1f51c5fe14a03371fbf2007fa6eaa3743ba08879d9a36e8a
font_02_sfnt_off0000a042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA042 18140 bytes
SHA-256: 9434a788ff50f2eb68b1bd28075b357801e0b7561df8489df8f6a6f67a5d199f

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