Malicious PDF — malware analysis report

Static analysis result for SHA-256 b03bff75e6b22702…

MALICIOUS

PDF

45.3 KB Created: 2021-05-16 20:40:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1a1ef7992297a2aee0675aca104e3bd4 SHA-1: a6b7a433c375a89930f700d7363bbaeeeadd0a3b SHA-256: b03bff75e6b22702f2f8cacdb382f87a04de6952dd18bdb69e93a188245bf9d9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary lure pointing to a 'free generator / game hack' website. This suggests a social engineering tactic to trick users into visiting a potentially malicious site. The ML classifier also flagged this PDF as malicious, increasing confidence in its harmful nature. No scripts were extracted, but the presence of numerous game-related lures and the high-risk URL indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9551

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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-hair-roblox-boy-game-hack PDF link annotation
    • https://www.tdbaska.hr/files/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/coin-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/coin-master-online-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • https://www.tdbaska.hr/files/roblox-old-avatar_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
stream_003_off0000489a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x489A 26432 bytes
SHA-256: 7f0db3f32e3feed23b3d45d00521b1775f7482147a2733d4b9196c88429d7460
font_01_sfnt_off0000843c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x843C 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DED 18476 bytes
SHA-256: 342c800fef319d477b03ab518beae0bffc424861c275c3bcc7706f7950f542c9

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