Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde8f70c93097925…

MALICIOUS

PDF

33.5 KB Created: 2021-07-19 03:05:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a21e1bf3c342c5f768b77e1f0576fcf0 SHA-1: febc9b20c9dfbf57316198f3b49c3adbe95a1d42 SHA-256: fde8f70c93097925b192d354b088cb123c783dc571b8f0d65751a0098fdff297
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, including one specifically identified as malicious infrastructure. The document body and embedded links suggest a lure for "free generators" or "game hacks" to entice users to click. The presence of multiple malicious links and the ML classifier output strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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/835599320/how-to-get-tiktok-famous-free-game-hack In PDF document text
    • http://nicoletastancu.ro/images/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://nicoletastancu.ro/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/minecraft-education-free_GM479516143.pdfIn PDF document text
    • http://nicoletastancu.ro/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/how-to-get-free-robux-easy_GM431946152.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_off00002c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C9D 23340 bytes
SHA-256: 147968f0b8c1d09305659ceb42c461d12d9baec30d523ad1258158c864491133
font_01_sfnt_off0000612a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612A 18248 bytes
SHA-256: 9d8c9ff8f23476e9e897d50e05ba1c89fe9a64794c9c08e4c2e4cb1c87253222

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