Malicious PDF — malware analysis report

Static analysis result for SHA-256 e38d564abb617a7e…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 14:20:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: bcf3cdc4cf9d9682a2d9604971be8c46 SHA-1: e05134c6cdb316e428fca61e2cb3350fe696135b SHA-256: e38d564abb617a7ea6415327244264a039c9d7499046e11989ff6da3a4b4e591
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links, including one identified as a malicious redirector. The document body and heuristics indicate a lure for game hacks and free currency, which is a common social engineering tactic. The primary URL, http://netcdn.tw/app/406889139/20210-free-spin-links-for-coin-master-game-hack, is likely used to deliver a second-stage payload or lead the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/20210-free-spin-links-for-coin-master-game-hack In PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/hacking-lessons-for-roblox_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-aimbot-hack_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-free-printables-party_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-come_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_002_off00003060.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3060 22268 bytes
SHA-256: 1d261c822c8298c3ed0a824f1efaf036431e0f814c8a9f3a571c78418a761e48
font_01_sfnt_off000061e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E8 18748 bytes
SHA-256: 708165ba4c05304492c47ae2756e3ec5ad0c28727daaad1010e0ae42cc87a0d4

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