Malicious PDF — malware analysis report

Static analysis result for SHA-256 7887caa0159067b2…

MALICIOUS

PDF

45.7 KB Created: 2021-05-15 17:01:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4154247909dd0fb802c91eaacbe00cb1 SHA-1: e181dedbaabcee215b74930efd624ed893772a22 SHA-256: 7887caa0159067b240416ee73357ced2b77fe30917f4dcf862fbcd004275306a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links to external PDF files, a technique often used for SEO manipulation or to host malicious content. The primary URL, https://netcdn.xyz/app/431946152/roblox-promo-codes-free-robux-game-hack, suggests a lure related to game cheats or promotions. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, reinforcing the malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or content-luring campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/431946152/roblox-promo-codes-free-robux-game-hack
    • http://seniornetwanganui.org.nz/images/robux-link_GM431946152.pdf
    • http://seniornetwanganui.org.nz/images/coin-master-free-spins-link-blogspot-today_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/hack-coin-master-spin-apk_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/coin-master-free-coins-2021_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/free-robux-that-actually-works-2021_GM431946152.pdf
    • http://seniornetwanganui.org.nz/images/hack-coin-master-without-verification_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/how-to-get-free-robux-for-free_GM431946152.pdf
    • http://seniornetwanganui.org.nz/images/get-free-spins-for-coin-master_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • http://seniornetwanganui.org.nz/images/cmaster-club-coin-master-hack-tool_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/free-spin-coin-master-apk_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/coin-master-hacks-no-surveys_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/blox-pink-robux-free_GM431946152.pdf
    • http://seniornetwanganui.org.nz/images/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdf
    • http://seniornetwanganui.org.nz/images/gamehunters-coin-master_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/free-spins-coin-master-site-wwwquoracom_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/roblox-free-play_GM431946152.pdf
    • http://seniornetwanganui.org.nz/images/how-to-hack-coin-master_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/robux-app_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b97.bin
9d743c31a45eec98554ccf65506a72aa7853ebe7c891b6031c54e715eb04a2bd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B97 24792 bytes
font_01_sfnt_off0000842c.bin
49734f51977507cba6bc8d3ad0cee0363aa119856db094427deb9cf565bb7bca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x842C 3120 bytes
font_02_sfnt_off00008f3f.bin
3ed324e585500d41944ebd93500991c566830021fec9c5a8323b790459c3443f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F3F 18676 bytes

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