Malicious PDF — malware analysis report

Static analysis result for SHA-256 dabd4f8d56b5c5a2…

MALICIOUS

PDF

35.6 KB Created: 2021-06-19 23:48:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 413cd995cad6946fdad8aa959a6fe97e SHA-1: 1e5d1bb967b556d793dfa0798fcd7e2f7ca2b115 SHA-256: dabd4f8d56b5c5a2596daa5621d4d742e70e547a7e4307889cc1e99bb5d13438
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/how-to-change-your-roblox-name-for-free-2021-game-hack PDF link annotation
    • http://kcpb51.ru/images/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://kcpb51.ru/images/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://kcpb51.ru/images/roblox-cheat-engine-alternative-apoc-rising_GM431946152.pdfIn PDF document text
    • http://kcpb51.ru/images/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://kcpb51.ru/images/coin-master-stop-attack-hack_GM406889139.pdfIn PDF document text
    • http://kcpb51.ru/images/free-limited-in-roblox_GM431946152.pdfIn PDF document text
    • http://kcpb51.ru/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://kcpb51.ru/images/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://kcpb51.ru/images/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://kcpb51.ru/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://kcpb51.ru/images/free-roblox-gift-card-codes-july-2021_GM431946152.pdfIn PDF document text
    • http://kcpb51.ru/images/coin-master-hack-pc-2021_GM406889139.pdfIn PDF document text
    • http://kcpb51.ru/images/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://kcpb51.ru/images/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • http://kcpb51.ru/images/free-robux-generator-no-tan_GM431946152.pdfIn PDF document text
    • http://kcpb51.ru/images/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://kcpb51.ru/images/how-to-get-free-robux-on-roblox-october-2021_GM431946152.pdfIn PDF document text
    • http://kcpb51.ru/images/roblox-star-wars-lightsaber-battles-hacks_GM431946152.pdfIn PDF document text
    • http://kcpb51.ru/images/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • http://kcpb51.ru/images/can-i-get-free-robux_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
font_00_sfnt_off00003080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3080 22876 bytes
SHA-256: b61b8738ffc536841fe079f9625260b4561a0426643a8904976d8ee42ceadf82
font_01_sfnt_off0000639e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x639E 19944 bytes
SHA-256: d2dc04e8e0a7645ab4aa6350b315d7935398c97f6a8d4ddac9a56b4eedc100f3