Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ea84c8284016df6…

MALICIOUS

PDF

36.2 KB Created: 2021-07-03 12:14:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1f51058bbe0b431e91fe08da72ee1f24 SHA-1: d02521f990ced9018897ec14e2b9eb598f53302a SHA-256: 1ea84c8284016df6ea9cd5d5d5aaf6ed936a3a61b332adfff39f65af71d645aa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'game hacks' to trick users into clicking malicious links. The primary link, http://netcdn.tw/app/406889139/hack-crack-for-coin-master-currency-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for further exploitation or malware delivery.

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/hack-crack-for-coin-master-currency-game-hack In PDF document text
    • https://www.sonestad.se/library/repository/coin-master-hack-generator_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coins-master_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/tiktok-free-fans-and-followers_GM835599320.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-tix-hack_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/robuxfree-con_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-case-clicker-cheat_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/get-me-robux-for-free_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_off0000366e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x366E 23188 bytes
SHA-256: b697c269fba51558a3811c589d9ef2db3e4a68aff0b7f48861ced16bc181618c
font_01_sfnt_off00006a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7D 18488 bytes
SHA-256: 811fb9faacbe1105700380dc3d300d6af0061f738aadd421b3841696441b41e5

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