Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d4f85a1cda27deb…

MALICIOUS

PDF

39.5 KB Created: 2021-05-01 00:07:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bda84b16692919e7ced09b64cab5bd7e SHA-1: 9a20229d30f0eaac005a20371a1d068004ce30f9 SHA-256: 2d4f85a1cda27deb411f90a07e4a164fcfa28a0111bc4bfd14dd15b183428b36
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to a 'free Robux game hack' lure. This link points to known malicious redirector infrastructure, indicating a phishing or scam attempt. The presence of multiple PDF-specific heuristics for malicious redirects and lures strongly suggests a malicious intent to deceive users into visiting harmful sites.

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/rbxf-free-robux-game-hack In PDF document text
    • https://fridaytravelnepal.com/userfiles/files/cheats-for-royale-high-school-on-roblox.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-roblox-executor-purple-bunny.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/redeem-code-roblox-free-robux-2021.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-roblox-hack-without-human-verification.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-promocodes-hack.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-xbox-one-2021.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-hack-roblox-with-cheat-engine-mac.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/como-hackear-roblox-para-tener-robux-gratis.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-promo-codes-roblox-2021.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-fly-on-roblox-cheat-codes.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_off000040c8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x40C8 24656 bytes
SHA-256: 0ab1b570a318fb671222105a7ca2fa174215888fd5d3e71f3d9b3a20be56c5be
font_01_sfnt_off0000798b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x798B 18012 bytes
SHA-256: 35d3aa3cdd53ed483f95fce2b06e05ed68048a85e8fb29aab0b8befcbbafae2d