Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fda53df16b617a6…

MALICIOUS

PDF

42.2 KB Created: 2021-05-10 17:11:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 2067ffeb0552da1167283feca34cfd64 SHA-1: 80a896d761645cbecdcd8634ab86b966edcfc2ef SHA-256: 8fda53df16b617a662d62d42af86aa347d8b15ef0c6161c1e725f90f763e2767
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free generators' to lure victims. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially harmful content. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/406889139/descargar-coin-master-hack-game-hack In PDF document text
    • http://ycstamping.com.tw/image/data/files/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-hack-tips_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/claim-roblox_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-free-spin-link-new_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-account-taker_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_003_off000048ec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48EC 24980 bytes
SHA-256: c2c05950395a417d69c604e8d1d51e047a609b84fcaab15b05f009e79d0e0b8b
font_01_sfnt_off000082a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82A8 18172 bytes
SHA-256: c3867332f4dfccc328b78f313c3490d7baeec2f340b73ce4d0aaf0744ae5e9be

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