Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cdd06b247274a94…

MALICIOUS

PDF

35.4 KB Created: 2021-06-18 07:39:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 32098048d89cfbd85627ec87ca2d87ce SHA-1: 7f5c3c973b0e0608fa7e1ad78848f0bea9b0c1cb SHA-256: 8cdd06b247274a944947c6b730e1c4a576c1254ba48e2feaaf284645499dee34
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-make-ur-noclip-hack-undetectible-in-roblox-game-hack PDF link annotation
    • https://www.tiancom.com.tw/upload/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/make-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/tiktok-free-10-followers_GM835599320.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/hack-coin-master-net_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-scam_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-easy_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/moonactive-coin-master-free-spins_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_off000031a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A0 22432 bytes
SHA-256: 4644283cab9ac0ba5733dca532150d435a09be4be63ea4c3366ef0864f788cee
font_01_sfnt_off000063d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D1 19592 bytes
SHA-256: 84d0dc645149040d5c614fada620f26a15655e0a60933de9c8b0ca6d478fe11b