Malicious PDF — malware analysis report

Static analysis result for SHA-256 13462dac02a80b9f…

MALICIOUS

PDF

35.4 KB Created: 2021-07-03 12:10:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e0910426a2778ad9cb935f37a91c8bba SHA-1: 47d5c2622bafef27d9439d7cfaee03db7f6aa749 SHA-256: 13462dac02a80b9f5acbb5505e55205514fe8b437d498043836cd5919a299796
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'free generators' and 'hacks' for popular games. The ML classifier also strongly indicated maliciousness. The primary lure appears to be a scam related to game cheats and in-game currency.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/2021-free-spins-coin-master-game-hack In PDF document text
    • http://lib.unar.ac.id/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/minecraft-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-robux-2021-no-hacks_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/robux-offer-wall_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/coin-master-invite-friends-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/robux-earning-websites_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-robux-wihout-human-verification-or-downloads_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/minecraft-multiplayer-free_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_002_off000032ed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32ED 23080 bytes
SHA-256: 390483f353316fd9939e4450cee1d5547a8e3c1d58ae860eb54854b91a32375e
font_01_sfnt_off000066e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E3 18576 bytes
SHA-256: e072abe3ddea7348b6ad42f3e58cf0336d8cc97c01862fb082958ccb0059bec3

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