Malicious PDF — malware analysis report

Static analysis result for SHA-256 735a985df2302e81…

MALICIOUS

PDF

44.3 KB Created: 2021-06-04 04:10:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 14e460eab28dea0f064af5af802b4377 SHA-1: 4a517878c689c469db21633c984deffa636afc12 SHA-256: 735a985df2302e81a34cb6201ff2255210b5bf290ae5e12b52ba5b4923b6ff47
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector. The document body and heuristics indicate a lure related to game hacks and free currency, suggesting the links are intended to lead users to phishing or malware distribution sites. No scripts were extracted, but the embedded URLs and redirector heuristics strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/como-hackear-juego-coin-master-game-hack In PDF document text
    • http://digilib.stimata.ac.id/repository/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/com-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/daily-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/what-is-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/minecraft-apk-download-free-11-055_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/hack-para-tener-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/2021-free-spins-coin-master_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
stream_004_off00004f35.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F35 26404 bytes
SHA-256: d13d38cef67073ee62e0dd3ebab3f0fafe5dcb536151c56b3d858fdf9d53bddd
font_01_sfnt_off000089b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B4 18572 bytes
SHA-256: 08bd6afb78e7ba164a11b6bcff14b084761992f6b80076210b252904e123869d

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