Malicious PDF — malware analysis report

Static analysis result for SHA-256 3079d8755979a0c8…

MALICIOUS

PDF

41.8 KB Created: 2021-05-11 21:37:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 69c9c126d92412a1665676400a243569 SHA-1: aba86c9a91d45c9a6d80bcd384bcc75535694af6 SHA-256: 3079d8755979a0c865d33e308714ea33f58a3df8993533b39c2e61dcc10214b5
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 0.9971

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-card-link-coin-master-game-hack PDF link annotation
    • http://fobh.net/userfiles/files/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/robux-free-com_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/earn-robux_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/working-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/unlimited-coin-master-free-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
stream_003_off0000484e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x484E 25816 bytes
SHA-256: c3538936389af32384f25e1e4a116549edfd54ba660d6eefc9f43fb0e7481559
font_01_sfnt_off000081db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81DB 18056 bytes
SHA-256: cfb6ded867a7642321d4c76c2efd56b2991136bc968f29bb898a65be3c453579

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