Malicious PDF — malware analysis report

Static analysis result for SHA-256 22aa8950b8b61489…

MALICIOUS

PDF

47.7 KB Created: 2021-05-13 19:28:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8789b7405ed4f4d92a60724c0fe70d93 SHA-1: b7bd16ac337842bdf5abb08bdeed6e8aefdc2ae6 SHA-256: 22aa8950b8b61489501a2f623addb1700565fe2ce186da06f7d3491e763b00c0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which are part of a link farm designed to appear as legitimate download pages for game cheats and hacks. The ML classifier strongly indicated maliciousness, and the presence of a "download button" heuristic further supports a malicious intent to trick users into clicking these links. The document body, though heavily obfuscated, contains references to game hacks and a URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/free-back-accessories-roblox-game-hack PDF link annotation
    • http://tckontrola.hr/files/hackear-coin-master-sin-verificacion_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-free-spins-generator-no-human-verification_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/free-coin-master-spins-2021-link_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/hack-client_GM479516143.pdfIn PDF document text
    • https://tckontrola.hr/files/free-roebucks-com_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/free-robux-download_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
font_00_sfnt_off000049b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49B6 27712 bytes
SHA-256: 1a6f5ef30d739e97bb2c962a20c5e9876fcc8023a385a43de7a95b1d9ee84c72
font_01_sfnt_off00008b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B12 3608 bytes
SHA-256: 608f0dd4f6bfb6adbccec84228618ee8e4c9e09226d7330efb5300e499d1567f
font_02_sfnt_off0000979a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x979A 18468 bytes
SHA-256: ed1381c69922638ba3deea165f9c97413a9991048cfb55badf94070f5a9fa8be

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