Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4514f7874e68fd5…

MALICIOUS

PDF

40.2 KB Created: 2021-04-28 18:56:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 41b67bd268a0bff91a728186ff5b3600 SHA-1: 74123e90699f7702d54c38640d93267743e472fb SHA-256: a4514f7874e68fd5bec24ce37fd520c578ca6b7e4bacaa77b371ba204ec627ea
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, specifically advertising game hacks and generators. The primary lure URL is https://netcdn.xyz/app/431946152/how-to-get-free-vip-in-fashion-famous-roblox-game-hack, which is associated with a 'free generator / game hack' lure. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit user interest in game cheats to deliver a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9573

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/how-to-get-free-vip-in-fashion-famous-roblox-game-hack In PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/roblox-thomas-game-online-free.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/robux-hack-2021-on-phone.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox-ipad-only.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/scripts-hack-roblox.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/how-to-get-free-hair-in-roblox-2021.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/counter-blox-roblox-offensive-hacks-skins.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/roblox-free-expoit-that-run-loadstring.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_off00003cfb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3CFB 26644 bytes
SHA-256: e3beba80b375e0d382f93a7ae49ab044c397111cdca00653b94c3bba61767492
font_01_sfnt_off0000782f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x782F 19440 bytes
SHA-256: f45559445abe2e7c58509ff841dd9cc6f6a6b1aae0affef7f064dd98a1d7309e

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