Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e7597854b3f2836…

MALICIOUS

PDF

43.2 KB Created: 2021-06-03 16:30:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9f14c5e5796c532d59f8eb7c5beeafc6 SHA-1: 130d9af26e22fb041d447685df7b0764b9338ce5 SHA-256: 3e7597854b3f2836088e924b07a2938a03aaa0c42c126320e2ac7c4915943799
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a high-confidence heuristic firing for linking to a 'game hack' redirector, specifically pointing to a URL associated with Coin Master cheats. The document body, though heavily obfuscated, contains references to this URL and the game. This suggests a social engineering lure to drive users to a malicious site, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/coin-master-free-cards-link-game-hack PDF link annotation
    • https://www.andrology.co.uk/uploads/files/files/roblox-devil_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-tiktok-comments_GM835599320.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/pubg-uc-code-redeem_GM1330123889.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-unlimited-spin-hack_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/daily-free-spins-for-coin-master_GM406889139.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_004_off00004feb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FEB 24100 bytes
SHA-256: 1829162231eebfac7ebc49c87fa3c04bf0137d6bd75e4da4c82cf6e9271d10fc
font_01_sfnt_off000086cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86CD 18056 bytes
SHA-256: 4c00fba11e6222d30ce91962ad0846eff86227a46da4e4704094e367f0981575