Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fde0d934beb751b…

MALICIOUS

PDF

45.5 KB Created: 2021-05-15 03:02:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 3205a51038ce61db1f874f95fa51da0e SHA-1: 08c5c6309451e9ef172551332359cff6ba1c0e38 SHA-256: 7fde0d934beb751b1d16ca33a13e5f2eed68ce6e3abe00bd5d45b8fa473ced1c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and potentially malicious content, disguised as game hacks and generators. The heuristic firings indicate the document is designed to lure users to malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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.xyz/app/479516143/minecraft-pe-hack-client-ios-game-hack In PDF document text
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/get-robux-com_GM431946152.pdfIn PDF document text
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/fake-robux-codes_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cf8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CF8 25012 bytes
SHA-256: 833662946bccf2cac9771247642c46fc751ac346591d62cf0f695ac40fd2f064
stream_005_off0000900d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x900D 18108 bytes
SHA-256: e50e7ffc92e693739b6a1d5d28be47030cd8670fbb45c47044b0ac4b43b5d3d6
font_01_sfnt_off0000866e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x866E 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714

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