Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ee5858a866fc82…

MALICIOUS

PDF

35.0 KB Created: 2021-07-08 09:22:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 02228181c19ec75845b11b888cb4d460 SHA-1: 327c7a305628161eef7b8613b3405486480f0fa5 SHA-256: 48ee5858a866fc82d0253987d1c0e9df877fc4d8bd3545185450422573f480c3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, promising free game currency or hacks to entice users to click on links. The primary link directs to a malicious redirector infrastructure, which in turn serves other malicious PDF files. The document body and embedded links strongly suggest a social engineering tactic to trick users into downloading further malware.

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/431946152/can-you-get-robux-for-free-game-hack In PDF document text
    • http://www.valenciamaids.com/userfiles/files/monster-slaying-simulator-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/assassin-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-knife-code-assasins-roblox_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/take-anyones-robux-robuxian-hack_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-join-group-free-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-hack-tool-site_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/someone-keeps-hacking-me-roblox_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/como-instalar-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-hack-the-streets_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-robux-for-free-on-pc-windows-10_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_off000032b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B9 22300 bytes
SHA-256: b1567db27cfb050b128b6767db18526c2bcdbed621b38eaaa85c97c027e481cd
font_01_sfnt_off000063f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F4 18984 bytes
SHA-256: 2c6f447800a96913986af3bd62aa8a594d802346a7a39b4742ef2d084cdb3097

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