Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad6906d5233be70…

MALICIOUS

PDF

34.7 KB Created: 2021-06-28 16:11:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 95de4263256db4d98309c8a343d32786 SHA-1: 55349efb68eae1f519a2e65176ff62b5b7e6f4c0 SHA-256: 9ad6906d5233be70b8e79fd4618338412cdd8cf1e3c1a0c80ae90ffb3bb182f3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising free game hacks and generators. The primary lure URL is http://netcdn.co/app/431946152/free-robux-redboy-game-hack, which is associated with known malicious redirectors. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites.

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.co/app/431946152/free-robux-redboy-game-hack In PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/easy-roblox-today-hack_GM431946152.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/pokemon-go-free-download-latest-version_GM1094591345.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/hack-coin-master-game-apk-download_GM406889139.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/how-to-get-hacking-skill-roblox-entry-point_GM431946152.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/roblox-one-piece-millenium-hacks_GM431946152.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/free-online-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/is-roblox-free-on-the-nintendo-switch_GM431946152.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/roblox-free-items-event_GM431946152.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/roblox-free-tix-cheat_GM431946152.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/roblox-menu-hack_GM431946152.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/cheat-mod-on-lumber-tycoon-in-roblox_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_off00003178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3178 22060 bytes
SHA-256: f495a3f535b8c0a93fbb1d8f8efa486757c8ce347bcae18fa3b65bf283a66f7c
font_01_sfnt_off00006271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6271 19072 bytes
SHA-256: 45a88a0160bf5020529f53f95b17d9f9daed73d208b336e4170e565655528b55