Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ea6aade46ec2e1c…

MALICIOUS

PDF

37.8 KB Created: 2021-05-17 07:30:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5c62d026bb79fb7501348a2509e0f12d SHA-1: 8e5f035c6ee4e4d6626c9a09872faa95a37c7b3c SHA-256: 3ea6aade46ec2e1ca74b249a9f460c83e404b0e507e21e9721c858458119f783
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free Robux Hack Generator' and links to a known malicious redirector. The document body and embedded artifacts suggest a social engineering tactic to trick users into visiting a malicious website, likely for further exploitation or credential harvesting. No scripts were extracted, but the presence of malicious links and the lure indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-robux-hack-generator-game-hack In 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_off000032d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32D0 27452 bytes
SHA-256: 6bd7c13dc8514c85bb3ded79d3829577de4ed5e91e73d8306c1f5d83c2bad1a2
font_01_sfnt_off000071bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71BD 18516 bytes
SHA-256: ac45002ee2c78c55a094f6344a5e95abe10f4ed7f4298fc77d5376065a98214b

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