Malicious PDF — malware analysis report

Static analysis result for SHA-256 82cb70f0a818527f…

MALICIOUS

PDF

46.0 KB Created: 2021-06-03 14:52:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3c73209f7ee1fe0e4dcf200ffa58f49c SHA-1: 4cc876d99bc64e1885923aa6a8ce57a6e0ac5572 SHA-256: 82cb70f0a818527ffa7a0c29937b28640f1ff2a2675ff8e554cdb67eb39b3936
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 0.9864

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.online/app/431946152/roblox-hack-no-robux-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-moderators_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/when-pubg-uc-available_GM1330123889.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/freerubux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-minecraft-account-list_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-coins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/100-free-coin-master-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_004_off00005036.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5036 28416 bytes
SHA-256: ce8b4f712068733988eb672c6bb31418ecd196370e2bcf82a39bc20d60cea7bb
font_01_sfnt_off00009102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9102 18320 bytes
SHA-256: 5e119cf0fff6e15f39639019bba2d816655ca06056aca94f41e6b76ec8a8df35

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