Malicious PDF — malware analysis report

Static analysis result for SHA-256 e102ff7ba057a4bb…

MALICIOUS

PDF

30.8 KB Created: 2021-07-19 07:06:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bbe07923491af5806ec77c272e62bc3d SHA-1: ea279f35e0d5e61a2f90b0d4e4a578927384cace SHA-256: e102ff7ba057a4bbc98d8f082b4621d0a75398ead14623f224d46b85caaf7c16
170 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'free generator / game hack' which redirects to a known malicious URL. It also presents a fake CAPTCHA or human verification prompt, designed to trick the user into interacting with the malicious content. The embedded URL is the primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier clean score 0.0486

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 http://netcdn.tw/app/431946152/how-to-get-free-robux-without-verifying-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_off0000218d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x218D 22316 bytes
SHA-256: 5a9d02bb0629d2bc203560a72caa657b069b3b12a076e260bbcfaa726ec5d980
font_01_sfnt_off00005321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5321 19556 bytes
SHA-256: 3180b827c1ac204ed09c62f28e5521153ec6c9c19d09c72764a39a757af798e0