Malicious PDF — malware analysis report

Static analysis result for SHA-256 7809754d33d85f46…

MALICIOUS

PDF

40.5 KB Created: 2021-05-10 12:30:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 952fb894cd6288335f5de5468ea02b04 SHA-1: 73913c912e4d678c4287bf901fa1fc23b164560f SHA-256: 7809754d33d85f46dfe44343fd700d77d55338e953386fbb9cd5f2610d4543c4
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link that redirects to a website promising free game cheats, presented as a fake CAPTCHA or verification prompt. This indicates a social engineering lure to trick users into visiting a potentially malicious site. The embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/robux-free-promo-codes-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003285.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3285 27788 bytes
SHA-256: 7db5be45cbcbeda3d1310171b283c9949bccdba708dc9b677ab8283208c176de
font_01_sfnt_off0000721f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x721F 2872 bytes
SHA-256: 5a38050e56bfed6ba013c4835499ae05f4b57b22e606c9172dd4bc2ae7fd1207
font_02_sfnt_off00007bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDB 18604 bytes
SHA-256: 72370e69d4b3437de95b76ada03da26e1fdb3d0ee534a059885e6f785b63064d

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