Malicious PDF — malware analysis report

Static analysis result for SHA-256 6430fda2714e06f0…

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 04:18:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5c015360654b3728c85c9073d47a0825 SHA-1: af5066b1695a2f649e435175f8a3868c792fe2b7 SHA-256: 6430fda2714e06f076384dc9552267ce41e313614737515530ab6d8ae817a4c2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically advertising 'game hacks' and 'free currency' for popular games. The primary redirector URL is http://netcdn.tw/app/431946152/how-to-win-robux-game-hack. This pattern is indicative of a phishing or malware distribution lure, aiming to trick users into visiting malicious sites. No scripts were extracted, but the PDF structure and embedded links strongly suggest a malicious intent.

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/how-to-win-robux-game-hack In PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-only_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-promo-codes-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-online-free-spin_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/robux-hack-app_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-hack-download-no-virus_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/easy-points-gg_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_off00003373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3373 22312 bytes
SHA-256: e13ed62fd078cc978f7a6c0e8bff56a7b9cd9c491d04e6eaf312186ad47bd210
font_01_sfnt_off000064fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FB 19036 bytes
SHA-256: 44ba9238ce75834a6a7dc58668eb2302b56eb81db97fd63e2fbbc9b74053b22d

Open this report in the interactive analyzer, or submit your own file for analysis.