Malicious PDF — malware analysis report

Static analysis result for SHA-256 33be88f61b3490d3…

MALICIOUS

PDF

27.8 KB Created: 2021-06-27 19:48:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f14f668a0efd2a5c2bd5fb596c089ad5 SHA-1: b0cace2486ebac3d08119a6fc17ede3736aafbb6 SHA-256: 33be88f61b3490d30c9aca87b2c922609d20324cfb2f19d180eb6a48c49c02f7
130 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, disguised as "free generators" or "game hacks" for Roblox. The document body and heuristics indicate a lure to download or access a generator, which is a common phishing or malware distribution tactic. No scripts were extracted, but the embedded URLs and redirector firings strongly suggest a malicious workflow.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2916

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 http://netcdn.co/app/431946152/free-things-roblox-game-hack In PDF document text
    • http://www.sscs-uae.com/userfiles/files/aimbot-download-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/cheat-codes-little-mix-roblox-id_GM431946152.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/how-to-make-a-costume-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/robux-free-roblox-glitch-2021_GM431946152.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
font_00_sfnt_off00001a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A48 21324 bytes
SHA-256: f4f68ef32e2a1fe8b30001528e84dcb3a4ecd629b41605251ebf1cb4eb20b97d
font_01_sfnt_off0000490a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x490A 18936 bytes
SHA-256: 140e66014da446b693073cd4d93061bd4a1e41a4d43169b5f8ba9bc7d66813b6

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