Malicious PDF — malware analysis report

Static analysis result for SHA-256 c67f4e8a02d3da73…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 12:29:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cf775f1b5d0a0fef79307b2967349011 SHA-1: ca48fbc0ed9ddcdaa8a5245e3fb1c401ad9495f5 SHA-256: c67f4e8a02d3da73092c9da7dbd67f94e404dd7fd1ad7a656687037c8513ae91
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 'game hacks' and 'free generators'. The document body and embedded URLs suggest a lure to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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-hack-tuts-game-hack In PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-hacks-2021-free-robx_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-how-to-cheat-the-disconnect-thing_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-hack-roblox-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-get-free-robux-without-verifying-anything_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-roblox-accounts-2021-with_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/best-way-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-svg-free_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/hack-nuevo-para-roblox-2021-btools_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-data-breach_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_002_off000030f7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30F7 22804 bytes
SHA-256: 9867545f7d8f3a1a85f6358d0a76ebff0b22c1f9648b5cb59809fe78f809d88f
font_01_sfnt_off00006423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6423 18144 bytes
SHA-256: 2d81f3c8a0f5a355bcdb0e9c7d04d5f9e113c0ccd3f4805632d16c6e32449280

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