Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5885040a1836cca…

MALICIOUS

PDF

33.8 KB Created: 2021-07-08 23:12:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c4c52a295aa1219776c6cd563e4e52d1 SHA-1: 2259dd593df0450d6f8e62b4e33c88a002a12c96 SHA-256: f5885040a1836cca7f029d89ab6a30412d59637f2a415d260211a268b9491e14
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/hack-coin-master-for-free-game-hack PDF link annotation
    • http://ycstamping.com.tw/image/data/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-hack-355_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/pointsprizes-com-earn-free-robux-legally_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-conins-free_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-robux-hack-pastebin-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/speed-hack-roblox-app-engine-64-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-hack-for-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-card-hack_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-cheat-engine-scripts-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-hack-roblox-counter-blox-esp-aimbot_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/does-cheat-engine-work-for-roblox_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/oginject-co_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002e8d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E8D 22820 bytes
SHA-256: e2e97debca5e4802a180d5516103486f2cd71cc6a48c5a7f9f5f2ae3b79b94bd
font_01_sfnt_off000061d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D0 18168 bytes
SHA-256: be72a1914a99b846651b156c672e0768d1f742f579973333786d0ab12deac364

Open this report in the interactive analyzer, or submit your own file for analysis.