Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a4733676770190e…

MALICIOUS

PDF

45.8 KB Created: 2021-05-16 20:48:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6a3f9a213c6850f882ddd84df0515153 SHA-1: a25e9e7c9dc13b63b9c7c028e63c899a5ddb9d71 SHA-256: 7a4733676770190e79c623a262718ea9cc2c27f90c8293a1f22b2549097add2d
142 Risk Score

Malware Insights

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

The PDF document contains a lure for game hacks and free spins, specifically mentioning 'Coin Master'. It includes a critical heuristic for requesting recovery secrets, indicating a phishing attempt. The document also contains embedded URLs that likely lead to malicious content or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/coin-master-daily-free-spins-link-today-blog-game-hack PDF link annotation
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/is-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/blox-rewards_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/chisel-and-bits-mod-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-online-hack-2021_GM406889139.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_off00004ab8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB8 24780 bytes
SHA-256: 1e4f6077a6572bca3cec5a0ea12708f6888f316009fb31e31c35dfd710a69482
font_01_sfnt_off000083de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83DE 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC8 19156 bytes
SHA-256: c6e44e2d9e69c9765448dadb9ef0e8fe599e3907f261bb989cdf753410e037ff

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