Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d260165bc017ab8…

MALICIOUS

PDF

43.1 KB Created: 2021-05-18 02:10:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8d8f34ebe87423a35351c84fd09b0af5 SHA-1: 382ef032b33b75b588fb64635e11cbb365289783 SHA-256: 9d260165bc017ab85d1b0cb7cdfa2e638ac603f38ac5179c51f38bd884317972
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites that are advertised as game hacks and generators, indicating a lure for users to download potentially unwanted or malicious software. The presence of a known malicious redirector URL and the ML classifier's high confidence score further support this assessment. No scripts were extracted, but the document's structure and embedded URLs suggest a phishing or social engineering attack.

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/mcpe-master-coins-hack-download-game-hack In PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/get-free-coin-master_GM406889139.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/free-roblox-acc_GM431946152.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/install-coin-master_GM406889139.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/best-free-minecraft-hacked-client_GM479516143.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_off00004abf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ABF 26092 bytes
SHA-256: e0722042a01bd92b952edb74b918b7ebaab90928d1d7efd87e79730a0ff91887
font_01_sfnt_off00008585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8585 18472 bytes
SHA-256: d90a51be2fb0e46f52fe818f09ffb57ced98c32b74c64ba127c312db9c6591fd

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