Malicious PDF — malware analysis report

Static analysis result for SHA-256 f91c2c2e13692383…

MALICIOUS

PDF

41.5 KB Created: 2021-05-11 04:49:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 62d9678bd8971eeffac0dd61f0bc3775 SHA-1: 1d94d514cb2a54d77656ca61f455001eb8926c57 SHA-256: f91c2c2e136923837d02fe127d583217a5bc0f15cfc157bcdebb9afce2b4bea8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites that promise game hacks and cheats for popular games like Coin Master and Roblox. The heuristic firings confirm these links are intended as lures for game-related exploits. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest a phishing or redirection attack aimed at tricking users into visiting potentially malicious sites.

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/406889139/free-coin-master-androd-cheats-2021-game-hack PDF link annotation
    • https://au-ma.com/image/data/files/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-20-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-roblox-website_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/roblox-free-printables_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-robux-wheel_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-robux-hack-no-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_off00004885.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4885 24392 bytes
SHA-256: a4af19c4ff1068d8f211f7fae5e026d86f2e9598681f168a36cb3bd112a8ca72
font_01_sfnt_off00007f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F5D 18452 bytes
SHA-256: 61e5d8ad188eb015ddf9a5df69a65c9352fe70e06cc8ab935c42147f18f81b24

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