Malicious PDF — malware analysis report

Static analysis result for SHA-256 31752ee06c0ed5c9…

MALICIOUS

PDF

49.0 KB Created: 2021-05-30 13:00:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 52e53aab0506270002b948768dfbc93f SHA-1: 4405509166ff7ce8eaee38f39e9de852029c3677 SHA-256: 31752ee06c0ed5c96b2c2d5139b63463b010f2a7355e6cd87ca47520d620de5f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8017

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/406889139/free-spins-on-coin-master-2021-game-hack PDF link annotation
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/how-to-get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/hacks-roblox_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/tiktok-viewer-free_GM835599320.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-tiktok-fans-no-verification_GM835599320.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-coins-coin-master_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_off00005990.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5990 25364 bytes
SHA-256: 6d2d4b2ec55959194876d7566fd1eda505e05af61461290b764444e2f17dc2f8
font_01_sfnt_off000092ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92EF 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA0 18288 bytes
SHA-256: e7fc04cebd192de8ea685c8f65a9790caba4d729d1f53b0455241ee170bde56f