Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc884ce976ead48f…

MALICIOUS

PDF

45.4 KB Created: 2021-04-24 18:22:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 67d73517cb4626bc36eced41301e2465 SHA-1: 5edbfaa6ea6f9b94c9f77e54b0d0bb2e7679c9db SHA-256: fc884ce976ead48fb7ce545d4c88f8dbae03d3f56ffec2a9a9536995deac0b9c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on them, ultimately redirecting to malicious infrastructure. The primary lure involves 'game hacks' and 'generators' for popular games, a common tactic for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and heuristic firings strongly indicate malicious redirection and potential exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9814

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-piano-cheat-game-hack In PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/how-to-make-clothes-free-on-roblox.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/roblox-speed-hack-cheat-engine-2021.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/thebesian-get-roblox-ninja-animation-free-robuxian.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/hack-roblox-dragon-ball-final-stand.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/free-faces-roblox-catolog.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/free-robux-all-credit-pastebin.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/free-supreme-shirt-roblox.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/roblox-free-items-event.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/modo-hacker-roblox.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/how-to-get-robux-for-free-2021-no-hack.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004540.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4540 26108 bytes
SHA-256: faa94d6195d4f4feb908a4b628c618e3c479b26b64dea94d13790da990e48215
font_01_sfnt_off00008223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8223 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00008eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ECA 18556 bytes
SHA-256: c4ba3da12c0b64b4048d138c978b9049dddb7d4435a79e228a5f10333915ae58

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