Malicious PDF — malware analysis report

Static analysis result for SHA-256 288436d284f92de1…

MALICIOUS

PDF

35.9 KB Created: 2021-06-19 13:38:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8207efc5a183fd37a29bdaf09b43ab25 SHA-1: 3c631ef1b8c9217638437b1f3392f31c1adaeb10 SHA-256: 288436d284f92de1712b3926e5e3ee968062e2a3cc57aa37b4d1f77f4d04b4eb
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are part of a link farm designed to host files related to game hacks and cheats. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to direct users to download potentially harmful software. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-hack-noclip-download-game-hack PDF link annotation
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-hack-online-android_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/fulflex-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3403 22444 bytes
SHA-256: b866fdfd0f5cdb0b00d6ef70f259db09b29a3bbfe6318df986929c7520785d99
font_01_sfnt_off000065f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F2 19456 bytes
SHA-256: 10d6fce7e95a70ce15526e29a03ec3a26f96ba283eecf7a33517722032aee3be

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