Malicious PDF — malware analysis report

Static analysis result for SHA-256 31b57b6763be18d2…

MALICIOUS

PDF

41.8 KB Created: 2021-05-17 03:33:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8051245f69dbe1c5dffccc0a6cc30ee5 SHA-1: cf68d9def355931a80f2380cb21a612370b7d512 SHA-256: 31b57b6763be18d2399bbb928ac9aa6a9a8ff23d9c535b97b10631e7fc9d290d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on them by promising free game currency or hacks. The primary link redirects to known malicious infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially malicious websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/free-robux-come-game-hack In PDF document text
    • http://musestravel.com/images/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://musestravel.com/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://musestravel.com/images/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://musestravel.com/images/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://musestravel.com/images/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://musestravel.com/images/toolbox-mod_GM479516143.pdfIn PDF document text
    • http://musestravel.com/images/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://musestravel.com/images/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://musestravel.com/images/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://musestravel.com/images/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://musestravel.com/images/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • http://musestravel.com/images/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • http://musestravel.com/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://musestravel.com/images/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://musestravel.com/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://musestravel.com/images/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://musestravel.com/images/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://musestravel.com/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://musestravel.com/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://musestravel.com/images/how-to-get-free-robux-without-surveys_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
font_00_sfnt_off000046d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46D4 26116 bytes
SHA-256: 606ba816661da2f5fcd5c32b8f99166984cbdb39ae36391fd170ef8b509e6ee4
font_01_sfnt_off0000811b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x811B 18276 bytes
SHA-256: d7491fe45cc88596c87233a963b6162720bf27c142cea717df16fbc09fa29ea6