Malicious PDF — malware analysis report

Static analysis result for SHA-256 f013aabfed389202…

MALICIOUS

PDF

51.1 KB Created: 2021-05-01 02:13:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: d4ec72c24d82e7077cf656557ce86740 SHA-1: 0279e3e0ca6d8f2e6aa9cdb59185acc4f4ef19c5 SHA-256: f013aabfed3892025ffa61d0d9637ddc06f3321d4e9471f5118ba409d56d9977
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, with one prominent link identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to 'game hacks' for Roblox, aligning with the heuristic findings. No scripts were extracted, but the presence of embedded URLs and the nature of the lure indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9511

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-counter-blox-dll-hacks-game-hack In PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/be-a-hacker-on-roblox.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/roblox-speed-hack-2021.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/can-you-get-hack-in-roblox.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/roblox-weight-lifting-sim-hack.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/roblox-bgs-hacks.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/roblox-csgo-skins-hack.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-without-getting-any-apps.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/i-want-to-break-free-roblox-music-code.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/gamecodeseu-free-robux.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004085.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4085 28476 bytes
SHA-256: c667c1c12771d2af1ab6bd6900d10c468fc16b9ce06234e8e9bc7cb25ed22655
font_01_sfnt_off00008006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8006 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off000089c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89C4 11440 bytes
SHA-256: 154d59d1680f2d1e38ccb783d6997f344290d121007e51df331726de4128c12e
font_03_sfnt_off0000a4e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4E5 18592 bytes
SHA-256: 5f81039aedb4dc4eb5c381769f8ac2f6b61adcfce634fe894fcaa48211c3f6a8