Malicious PDF — malware analysis report

Static analysis result for SHA-256 846142bba0069563…

MALICIOUS

PDF

45.6 KB Created: 2021-06-10 13:58:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: dd7c99aa1a3f4cfd4268c77284954ed8 SHA-1: 5936a5fe5e3ee20e1483da8cfe458de40bd18dd7 SHA-256: 846142bba00695631b2a31b18f381cdef3f07885e3917ee4c8f27cd2ec1fc9e3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains links to a malicious redirector disguised as a game hack generator, aiming to trick users into clicking. The document body and embedded URLs reinforce this lure, suggesting a phishing or scam attempt. No scripts were extracted, but the presence of malicious links and the lure indicate a high likelihood of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/how-to-hack-a-roblox-user-account-password-2021-game-hack In PDF document text
    • https://razredna-nastava.net/files/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-roblox-templates_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/tiktok-free-64-bit_GM835599320.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/pubg-uc-website_GM1330123889.pdfIn PDF document text
    • https://razredna-nastava.net/files/tiktok-free-views_GM835599320.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-pocket-apk_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
font_00_sfnt_off000051e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51E8 25976 bytes
SHA-256: 739fcfda6fbb5830aab75aff0cc47fd89b66f7370629fde3286ddf34863e6838
font_01_sfnt_off00008bc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC0 19504 bytes
SHA-256: efa31a406ec5a60d66e2325037304dcff7865f303507289630369c753359fc7c

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