Malicious PDF — malware analysis report

Static analysis result for SHA-256 101b7de9ccd639dc…

MALICIOUS

PDF

40.1 KB Created: 2021-05-11 15:31:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7a59c4a5caee04dd69c045eab226d2d6 SHA-1: 6a21dd9ac3a1289fd572cb8320322598faa8a647 SHA-256: 101b7de9ccd639dc7b3860333e8302659ed30b9c9dd7ec7d504a81c7b2226991
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains multiple heuristics indicating a lure for game hacks and malicious redirector links. It presents a fake CAPTCHA to trick the user into interacting with a malicious URL. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-websites-2021-game-hack, which is associated with redirector infrastructure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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-websites-2021-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000329e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x329E 26396 bytes
SHA-256: 5015cd2f869179baf748c8b8758d618885c7ae987396ef4279a6a83a156519c0
font_01_sfnt_off00006f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8D 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off0000794e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x794E 18836 bytes
SHA-256: ef44fc6ccc8558fc54da3394cf76e38d99de94399ef86c3bb36f5b939f331685

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