Malicious PDF — malware analysis report

Static analysis result for SHA-256 9765d9692c4debed…

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 07:40:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: af3f99835cf860833a80ca4f973be141 SHA-1: f9a3d44dfbd4457aa800430fbaed9e2fe2717e2a SHA-256: 9765d9692c4debeda8825e8ae7aac9f1bf261739c63ede59bf04e94a6a650fd5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'generators'. The primary lure URL is https://netcdn.online/app/406889139/coin-master-spins-hack-2021-game-hack, which is flagged as a known malicious redirector. The document body and embedded links suggest a social engineering tactic to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-spins-hack-2021-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/robuxglobalcom_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-vip-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/oprewards-com-earn_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_off0000520d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x520D 24892 bytes
SHA-256: 3573b2a1d46df0b857e021b24c71b70b2b5d188824701ecc9cb9a4bc64cfb3a4
font_01_sfnt_off00008a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A25 18296 bytes
SHA-256: eaa60ab3b9dbdc46d7aef4d77b4227c1d0aeb4180c3635ae77be6ae4ebf58c24

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