Malicious PDF — malware analysis report

Static analysis result for SHA-256 546c199a5a5e863b…

MALICIOUS

PDF

35.8 KB Created: 2021-07-06 11:52:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d6c2d64a7e214e123874e41cc0713d87 SHA-1: 1b47bf92b749f768b16d015727874462ff97c1f3 SHA-256: 546c199a5a5e863b5fa40443cb4b8bca036ee46683502839d4362554c306d224
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.tw/app/406889139/free-spins-coin-master-2021-game-hack PDF link annotation
    • https://tena-g.hr/files/apk-hack-for-roblox_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/free-robux-app_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/roblox-hack-robux-descargar_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/roblox-spiderman-package-full-suit-free_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/500-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • https://tena-g.hr/files/a-game-were-you-can-get-free-robux-roblox_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/noob-vs-pro-vs-hacker-roblox-bee-swarm-simulator_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/free-money-hack-roblox-jailbreak_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_002_off000031df.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31DF 23788 bytes
SHA-256: dc7bfae1eab766d5bcda040113f882e65ada0ce83e3d6978fda8c01048c99f5d
font_01_sfnt_off0000684c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x684C 18576 bytes
SHA-256: 461056571ca453647e3c969961301e9f27cf934f5ba6ca99c4dfe7c56792b440