Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f5c3a69552d6ad7…

MALICIOUS

PDF

34.4 KB Created: 2021-06-26 11:02:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8e3d73705d53244c5bfd47313a038d5d SHA-1: aba92e5944a8bda0fc5d819f2b511daee01828b3 SHA-256: 6f5c3a69552d6ad73b26a0f716a22b56a77f0d4cdb64520ac2bd4921b5a0fb30
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-dungeon-quest-lvl-hack-game-hack PDF link annotation
    • https://smark.com.tw/image/data/files/how-to-scam-on-roblox_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/robux-download_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-robux-game-guardian-script_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/ldshadowlady-roblox-someone-hacked-my-acount_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-generator_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/tiktok-free-tools_GM835599320.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-cheat-engine-shut-down-server_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-spin-coin-master-2021-link_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
font_00_sfnt_off00002ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DED 22456 bytes
SHA-256: f93131133be68aa10a3fb2c317d6cb287891f14d525c71d4417b42bf86a89c31
font_01_sfnt_off00006022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6022 19340 bytes
SHA-256: 6fce93c51caeb402b7b5e41ef4f43c8075d1f1240737a0a49a092be20b977480

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