Malicious PDF — malware analysis report

Static analysis result for SHA-256 958652a1eeb575d9…

MALICIOUS

PDF

47.8 KB Created: 2021-06-03 09:23:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 16bd92fa3793eaf008107d9c546276ea SHA-1: 15ed4bfab4876c05558d2b8c816944d1eca96fe2 SHA-256: 958652a1eeb575d91f380666f9dd6bc0b2cccd56a2edff85c33855b0499ee554
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body and embedded URLs strongly suggest a phishing or scam attempt to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/431946152/roblox-free-robux-no-verification-game-hack In PDF document text
    • http://battistibrothers.com/system/userfiles/files/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/play-coin-master_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/coin-master-pet-food-free_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/coin-master-download_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/free-robux-no-email_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_004_off000050a1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50A1 26228 bytes
SHA-256: cc78a2d01620cafa9fc461df5f7e22f17f169350606541ac92f54fb49d683193
font_01_sfnt_off00008d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D06 2828 bytes
SHA-256: db1860fd79a3f2cbe32e2bada3ba4c68a2d581b7a24294387cd777233cc9cef6
font_02_sfnt_off000096bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96BD 18676 bytes
SHA-256: d88aecf2630d4fcf6e85b9a2b5560aad6055705ec2bb19cbd5d89ce1bd292ac8

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