Malicious PDF — malware analysis report

Static analysis result for SHA-256 6967d6d1c71504b4…

MALICIOUS

PDF

44.0 KB Created: 2021-06-11 11:05:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8334d247c64ad0be985f6895cdced50f SHA-1: 54d83848c7c621963722ccc20d92a2ce25af3b2c SHA-256: 6967d6d1c71504b4ff8034f6f44dfe7686df8077c2e5e772bba1c3a85250c9b4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically advertising game hacks and generators. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest an attempt to drive users to download or interact with further malicious 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.tw/app/431946152/roblox-final-stand-2-cheat-game-hack In PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-generator-tool-download_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-kawaii-bread-t-shirt-for-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-lebansay-group_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/buying-rich-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-a-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/get-pokemon-go-free-coins_GM1094591345.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-tools_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-spins-link-2021-today_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_off00005195.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5195 23720 bytes
SHA-256: d739cc643cd037ab321cb2387d7494befdf1f10d453c2460d4982142d1584121
font_01_sfnt_off00008771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8771 18864 bytes
SHA-256: 3fea6424a4b91b8a15df22d31731cfec673bdc782519a1128b963cff98f252dd

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