Malicious PDF — malware analysis report

Static analysis result for SHA-256 713d8a678a9a5e75…

MALICIOUS

PDF

35.1 KB Created: 2021-05-16 15:08:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4ae6f255d5b4656fa8f5e0e787477441 SHA-1: 592e6108727741c291ea65fb212125796cb06103 SHA-256: 713d8a678a9a5e75e3f0b4bfb94eef99d45be3c3fca5be4699423820c7565c3f
170 Risk Score

Malware Insights

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

The PDF document contains a malicious link disguised as a lure for game hacks and free generators, which is a common social engineering tactic. It also displays a fake CAPTCHA to trick users into interacting with the malicious link. The embedded URL points to known malicious redirector infrastructure, indicating a high likelihood of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0306

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/best-free-robux-sites-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
stream_003_off000031e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31E2 23736 bytes
SHA-256: 46af9cd5461b213c5b83f5af490f8d00c0c7b2a321a861754f0a0b8896940541
font_01_sfnt_off000067b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B1 18236 bytes
SHA-256: 68f5330c443815a71c203001c9650c5b168215c0ad869b16e6a359c0f2b36386

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