Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fea8f0c7f23f707…

MALICIOUS

PDF

33.4 KB Created: 2021-07-19 10:23:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6f7665ec0916d6121c18b9808748b039 SHA-1: 5c34f24d87bc91d332353d6ebbf3ce0b33954e7f SHA-256: 8fea8f0c7f23f7078a7bf38814a01fbbb7b901a4b3916c0b2474fd9a5d878c93
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, disguised as a 'free Robux hack'. The document body and embedded URLs indicate a lure for game-related cheats or currency, a common tactic for phishing or malware distribution. The presence of embedded URLs and the nature of the lure suggest an attempt to redirect the user to a malicious site, likely to download a secondary payload or harvest credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 4

  • 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.
  • 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/free-robux-hack-no-human-verification-game-hack In PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/play-minecraft-for-free_GM479516143.pdfIn 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_off00002cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CC3 22048 bytes
SHA-256: 3d8213357947b7b811c24084e611907dadad400501842c95644da2805db4e7ae
font_01_sfnt_off00005da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA1 19216 bytes
SHA-256: e0f254d6bdc22578be9872c5e472ec3e587f5271bc56725c7cf8f1860bbc5ee3

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