Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfeda2c6983b30df…

MALICIOUS

PDF

40.4 KB Created: 2021-05-01 14:55:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d4ad877a2ac01fcad20f40f59046578a SHA-1: 9013405abc6abf215c577c626ce822b04977511f SHA-256: bfeda2c6983b30df5c6dd07d2cc54c066519c76e5beea45330684a96b176e271
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action button designed to lure users into clicking on a malicious redirector URL. The content suggests a phishing attempt related to game hacks and in-game currency, likely to trick users into downloading further malware or visiting scam sites. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/roblox-westover-hacks-game-hack In PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-free-robux-no-real-money-2021.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/hacker-roblox-server.pdfIn PDF document text
    • http://technibuild-group.com/uploaded_files/userfiles/files/a-cheat-engine-67-do-roblox-aim-bot.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/hack-para-sharkbite-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/robux-cheats-no-human-verification.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-hack-in-every-game-in-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-use-cheat-engine-on-roblox-swordburst2.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/cheat-on-roblox-2021.pdfIn PDF document text
    • http://technibuild-group.com/uploaded_files/userfiles/files/admin-console-hacks-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-shirt-roblox-avatar.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
stream_003_off000041a6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x41A6 25644 bytes
SHA-256: 73217eece90676daa9c2563bf9cf5fa4b28a887987adc2f0986f2d4c878d3731
font_01_sfnt_off00007ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB5 18596 bytes
SHA-256: b42f08679fb7bf2b3af4fff1e90f570d6defe03bf97015ad7e70b0de45061e2c