Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac52b4119b842c4a…

MALICIOUS

PDF

43.0 KB Created: 2021-05-11 15:36:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f85d36ca06cf2ed89d2daa1a4abefc5d SHA-1: 8995382609b973a703cd8505edc28264269f37e7 SHA-256: ac52b4119b842c4a4741c94cb52d6d3e2534c7bd87287b7951f86644620b03ef
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 0.9971

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/479516143/how-to-get-a-cape-in-minecraft-for-free-game-hack PDF link annotation
    • http://www.my-travel.com.hk/upload/files/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-weird_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-free-spins-and-chips_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-coins-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-many-free-spin-links-is-there-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_003_off00004d00.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D00 25256 bytes
SHA-256: f2f6b4781d9c5f7983ef1b92a2f8bc58e3ef2b358023834972e423288f7342e0
font_01_sfnt_off00008688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8688 18052 bytes
SHA-256: 651613c0b0933ea46dfe34ab8437030315119b6d54c219aba7cf9326f75e4fa1