Malicious PDF — malware analysis report

Static analysis result for SHA-256 349fd2f52985b160…

MALICIOUS

PDF

43.9 KB Created: 2021-06-03 22:29:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ba07006963705e634a12cf9aca945453 SHA-1: a6979dc930c75abb8be4f7efb472f088a1fb18f5 SHA-256: 349fd2f52985b1609b92f17409265425bec1797b8909bbb3dbe96ae0e092e048
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous external links, many of which are structured as SEO-optimized PDF links, suggesting a link farm. One prominent link points to a game hack download. The ML classifier strongly flagged this PDF as malicious, and the presence of a visual download button lure further supports a malicious intent. The document likely serves as a lure to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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.online/app/479516143/simplysarc-game-hack
    • https://library.stikeswnpalu.ac.id/repository/coin-master-hack-2021-android_GM406889139.pdf
    • https://library.stikeswnpalu.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-spin-today_GM406889139.pdf
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • https://library.stikeswnpalu.ac.id/repository/free-robux-pin-codes_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/real-coin-master-free-spins_GM406889139.pdf
    • https://library.stikeswnpalu.ac.id/repository/link-for-free-spins-on-coin-master_GM406889139.pdf
    • https://library.stikeswnpalu.ac.id/repository/free-fans-on-tiktok_GM835599320.pdf
    • https://library.stikeswnpalu.ac.id/repository/mobihack-net-roblox-hack_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/free-spins-on-coin-master-hack_GM406889139.pdf
    • https://library.stikeswnpalu.ac.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • https://library.stikeswnpalu.ac.id/repository/free-spin-coin-master-twitter_GM406889139.pdf
    • https://library.stikeswnpalu.ac.id/repository/how-do-you-get-roblox-for-free_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/get-free-spins-coin-master-2021_GM406889139.pdf
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-coins-link-2021_GM406889139.pdf
    • https://library.stikeswnpalu.ac.id/repository/pubg-uc-hack-app_GM1330123889.pdf
    • https://library.stikeswnpalu.ac.id/repository/free-spins-coin-master-cheat_GM406889139.pdf
    • https://library.stikeswnpalu.ac.id/repository/free-robux-no-scam_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/robux-converter_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051f6.bin
02480eccce3a56714782fc9de7dfb4831e26e5f91d330f4c88814071254cc197		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51F6 24428 bytes
font_01_sfnt_off000089c0.bin
d1e3c8cc46daa8b4e8a3620fd036fa3afc0951971ec214e12238e772f71f3550		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89C0 18156 bytes

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