Malicious PDF — malware analysis report

Static analysis result for SHA-256 01fa43e44a87e8ca…

MALICIOUS

PDF

35.1 KB Created: 2021-07-09 11:41:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0f8b3b0937ce0169429ef39e128a172b SHA-1: 5241a7733a27bf1d9ff95480f2e07f0337006f23 SHA-256: 01fa43e44a87e8cabf5b744bc1f84da924f0ace52551829a1ab4d3a3bbde504d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains links to a known malicious redirector infrastructure, which in turn hosts other malicious PDFs. The document body and heuristics indicate a lure for game hacks and free currency, a common social engineering tactic. The primary malicious action observed is the redirection to potentially harmful content hosted on external sites.

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/coin-master-free-spins-link-2021-game-hack In PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/free-coin-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/roblox-free-followers-bot-2021_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/roblox-speed-hack-2021-may_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/free-tiktok-likes-and-views_GM835599320.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/roblox-free-robux-copypasta_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/free-robux-games_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/roblox-jailbreak-hacks-dll_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/minecraft-windows-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_off00003088.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3088 23272 bytes
SHA-256: 6ef6bbcc17aebb0fcb3a2f3fc0d72d2cc18fad5a50b01aa59daec6ebe19983c3
font_01_sfnt_off000064fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FE 18748 bytes
SHA-256: 785b8830476a1dba2603225cf55ebb3d3433825858fb25e5612ad86a59b30773

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