Malicious PDF — malware analysis report

Static analysis result for SHA-256 783f04a54dd892f6…

MALICIOUS

PDF

43.7 KB Created: 2021-06-03 22:08:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: dbfefd539bc340b79dff2d26f9d1dcdb SHA-1: 23fa84ca96e5ddcc4c36bcef26a96c3619b82971 SHA-256: 783f04a54dd892f6ea29fd667afc50d971f7ba63ddf12b2e579cf60590f37c52
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, with a primary link identified as a malicious redirector. The document body and embedded links suggest a lure for game-related cheats or currency, aiming to trick users into visiting the malicious URL. Although no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow.

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/coin-master-hack-2021-without-verification-game-hack In PDF document text
    • http://www.library.umbjm.ac.id/repository/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-shield-link_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-items_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/download-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-generator_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/daily-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-redeem-codes-2021_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_004_off00004e16.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E16 24660 bytes
SHA-256: bf6244113782ddba885b7404e7cac5936c2420acc333d667553c2b8a2e90a933
font_01_sfnt_off0000869d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x869D 18756 bytes
SHA-256: 8aa4e312459bb9d5d616f22e45372e364c039c39adebed3f09684cd63dbfffd3

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