Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f47777a5c777e34…

MALICIOUS

PDF

45.2 KB Created: 2021-05-19 02:26:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 87caa67ffecdb14a80a2063ad3ff3628 SHA-1: b0fcbd6be671399e53cd265aa370aefdf59a4692 SHA-256: 0f47777a5c777e34df6a63f73dba957dfd0ef6912fafb45dc0908d33c70ba90f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are SEO-optimized and point to websites offering game cheats and virtual currency. The ML classifier strongly indicated maliciousness, and the presence of numerous links suggests a link farm designed to redirect users to potentially malicious sites or download further payloads. The document body, though partially corrupted, contains a URL related to 'pokemon-go-free-quickest-charge-moves-game-hack', reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9551

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/1094591345/pokemon-go-free-quickest-charge-moves-game-hack PDF link annotation
    • http://webstan.be/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/free-robux-script_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/coin-master-hack-no-verification-no-signup_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/114-hacks_GM479516143.pdfIn PDF document text
    • http://webstan.be/images/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/coin-master-hack-no-verification_GM406889139.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
stream_003_off00004829.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4829 24636 bytes
SHA-256: bfa7edb1cf46485cfda3e6b81a2293fba1a1b624c44a4b658b738c75126e01bd
font_01_sfnt_off000080bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80BC 3148 bytes
SHA-256: c037fe4e368cced94bb6ecd76ec3741d29134569da47413def95fc9835bc02f0
font_02_sfnt_off00008bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC1 19160 bytes
SHA-256: 290ffd9e96040bbb0b743619bb70963bb633a169c53da09c8d56b0221ca8d4f9

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