Malicious PDF — malware analysis report

Static analysis result for SHA-256 8475c5f234a29739…

MALICIOUS

PDF

43.8 KB Created: 2021-06-03 22:11:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0663d79e1efcdc3595a1fa9de2bb318f SHA-1: 32e50e092c98e142e762006171b58f55cfb98b75 SHA-256: 8475c5f234a29739e7f43281f1f690a123950d1ab82e3d7889500b3fbb3269b8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free generators' and 'game hacks' to entice users. It contains multiple embedded URLs, including a primary redirector at `https://netcdn.online/app/406889139/coin-master-hack-without-verification-for-iphone-game-hack`. The presence of these links and the heuristic firings strongly indicate a phishing or scam attempt designed to lead users to potentially malicious content or further compromise.

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-hack-without-verification-for-iphone-game-hack In PDF document text
    • http://library.acehresearch.org/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/rbx-com_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/pokemon-go-free-30-ultra-balls_GM1094591345.pdfIn PDF document text
    • http://library.acehresearch.org/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master--hack_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-minecraft-accounts-reddit_GM479516143.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_off00004fa4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FA4 24540 bytes
SHA-256: 5aac8a9b804c75bf73019754ffd7f0afb13e7ada8e3a0d5bc5ed96271da273b1
font_01_sfnt_off00008751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8751 18696 bytes
SHA-256: b0c3a89d711ec100aafe578ee7b28ea2727b66157cc397f5079d3cb8995e9fec

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