Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ddce46142a5e7b7…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 10:27:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 04db62f8563b0b7f41a2b7f5ba225826 SHA-1: 0eee040bd9b8ad57e6a8f220aa31dd1d56c81d45 SHA-256: 1ddce46142a5e7b7222e7f518490ab5ad07e996d050bf8ee32bfa0e52854d6c4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a common lure of "free generator / game hack" to entice users. It contains multiple embedded URLs, with a primary redirector identified at https://netcdn.online/app/406889139/coin-master-free-spins-link-2021-today-game-hack. The ML classifier and specific heuristics strongly indicate malicious intent, likely to lead users to a compromised site or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/406889139/coin-master-free-spins-link-2021-today-game-hack In PDF document text
    • http://www.library.gkigadingserpong.org/repository/levvvel-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/download-roblox-hack-robux-apk_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-net_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hack-tiktok-fans-free_GM835599320.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-generator-for-roblox-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_off000058c1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x58C1 24904 bytes
SHA-256: 6e9cc7d7eab16e59c467406e128b43cdae283c6da9b98064c306c869ca2db96f
font_01_sfnt_off0000917b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x917B 18812 bytes
SHA-256: 705c5903f824403b328e8e9dbd2ab52a650d097fc3c0d4bbd34be772086d041a

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