Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e144e5f5849e6bb…

MALICIOUS

PDF

42.0 KB Created: 2021-05-17 10:01:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6d010b9d41be34697d2f4b4d82656c1d SHA-1: d25924ac2979bbcd333a5983f616bf839acb9e67 SHA-256: 3e144e5f5849e6bbd46669ead12b14b7087172fa92e579db34701aefb2b0ef89
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to external resources related to game downloads and cheats. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests a distribution mechanism for malware or unwanted applications. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or social engineering attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/479516143/minecraft-pe-apk-download-game-hack
    • http://tdfsinfronteras.com/images/free-apk-mod-coin-master_GM406889139.pdf
    • http://tdfsinfronteras.com/images/free-robux-games_GM431946152.pdf
    • http://tdfsinfronteras.com/images/free-robux-generator-no-verification_GM431946152.pdf
    • http://tdfsinfronteras.com/images/coin-master-official-fan-page_GM406889139.pdf
    • http://tdfsinfronteras.com/images/minecraft-free-download-windows_GM479516143.pdf
    • http://tdfsinfronteras.com/images/free-robux-no-verification-2021-android_GM431946152.pdf
    • http://tdfsinfronteras.com/images/coin-master-apk_GM406889139.pdf
    • http://tdfsinfronteras.com/images/coin-master-online-free-spin_GM406889139.pdf
    • http://tdfsinfronteras.com/images/hack-a-game_GM431946152.pdf
    • http://tdfsinfronteras.com/images/instagram-free-coin-master-spins_GM406889139.pdf
    • http://tdfsinfronteras.com/images/free-spins-from-coin-master_GM406889139.pdf
    • http://tdfsinfronteras.com/images/coin-master-free-spins-1701-20_GM406889139.pdf
    • http://tdfsinfronteras.com/images/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdf
    • http://tdfsinfronteras.com/images/free-spins-coin-master-links-app_GM406889139.pdf
    • http://tdfsinfronteras.com/images/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • http://tdfsinfronteras.com/images/cmaster-club-coin-master-hack_GM406889139.pdf
    • http://tdfsinfronteras.com/images/coin-master-free-daily-spins-and-coins_GM406889139.pdf
    • http://tdfsinfronteras.com/images/roblox-generator-no-human-verification_GM431946152.pdf
    • http://tdfsinfronteras.com/images/are-minecraft-realms-free_GM479516143.pdf
    • http://tdfsinfronteras.com/images/coin-master-cheat-engine-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049a0.bin
b94e8e3100870ab50194a4802cdb36da9b3148d3a6d9d44e23170c8d9bf82108		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49A0 24192 bytes
font_01_sfnt_off0000803a.bin
8791d3cc95b23c4b4e10828445a3a5a1b9cddfea01917aff66a6701f48000f7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x803A 18788 bytes

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