Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b2f37ab7f2d0309…

MALICIOUS

PDF

44.8 KB Created: 2021-05-12 10:40:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 40ec2880f9a89f1d75a21ab74efe9fe3 SHA-1: c6f960331d7a91f9befa91529106687db693e8e4 SHA-256: 0b2f37ab7f2d030975e56653699958c4675dcad73261f2e697b7962ea92bb00d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector. The embedded URL, https://netcdn.xyz/app/406889139/master-game-game-hack, is the primary indicator of malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a social engineering tactic to drive users to potentially malicious content, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/master-game-game-hack PDF link annotation
    • http://katalog.gemalibrary.net/repository/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-ios-gods-hack_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hacks-xyz_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/robux-generator-no-verification-needed_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_003_off00004b19.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B19 25276 bytes
SHA-256: 10b86adff840ec6824a102f1ba4c24d5624d728e7b390fc7aba9fde6b6bb8435
font_01_sfnt_off000084e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E1 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E93 17544 bytes
SHA-256: 44079931098346f7cdde8bd5f0c3b73feb35dbebb32e3fa750be4e0f1d61dc42

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