Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca34baee2f9ed8b1…

MALICIOUS

PDF

43.4 KB Created: 2021-06-03 13:53:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 16d1ae3c103b4bd0a2147a617e31f3cb SHA-1: 10729cdaae2c0c9ff0cfd12745299f29099378be SHA-256: ca34baee2f9ed8b1588f48e2704a1923a355c22448ffb545c755d8a1a54b5eb3
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 0.9865

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-accounts-for-sale-free-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/play-coin-master-online-free_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/tiktok-followers-generator-free_GM835599320.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-strategy_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-hack-2021_GM431946152.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_off00004ef5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EF5 24164 bytes
SHA-256: 648dafc823b13251ef593789311b6d4554146722545c3fea35ade4b659a95076
font_01_sfnt_off00008654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8654 18420 bytes
SHA-256: dd3ad9a96696997a3401d80a50f84ab99edff121f3fdc84dc04c1b1c7a8d1cbe

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