Malicious PDF — malware analysis report

Static analysis result for SHA-256 322c0069c1043659…

MALICIOUS

PDF

41.4 KB Created: 2021-05-04 17:10:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0de683094af8714f1b1652edd0a47da4 SHA-1: b90bd9359bf81f098df4e90f6931d7f7eea9cf8e SHA-256: 322c0069c104365956071075317ca142015e38de840420f26c0f3f349fd8d633
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a lure for Roblox game hacks. The document body reinforces this by displaying a link to the same malicious domain and a call to action. The presence of multiple related PDF URLs suggests a campaign distributing similar lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/free-roblox-com-accounts-game-hack In PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coolest-free-roblox-items.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/trrbx-site-free-robux.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/buy-delta-lite-roblox-hack.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/hacks-in-bee-swarm-simulator-roblox.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-raindrop-roblox.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-a-free-bc-account-on-roblox.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-game-hack-robux.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/get-free-robux-no-survey-no-download-2021.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-lots-of-robux-free-2021.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-hack-pizzeria-roleplay-remastered-roblox.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_off0000440c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x440C 26160 bytes
SHA-256: cb4234bfb9a4e0b1527f7d56be958bbcd96bdc04536d6efd06613d49391e9008
font_01_sfnt_off00007fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD0 18452 bytes
SHA-256: c99130246d46fdcd5e9c4e7e44c81259312eba1873176d173f6e47132d15c114