Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a00531663d1a8cb…

MALICIOUS

PDF

29.8 KB Created: 2021-07-18 23:23:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c1f652c54004bcc3ad84717f1e4eadd9 SHA-1: 0e50b1620916d17e82cd140b24f410c35b3c1336 SHA-256: 1a00531663d1a8cb9401f24998fab160bdc7cb8358ac4619a428b18ece01f17b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one to a known malicious redirector infrastructure, disguised as a 'free generator / game hack'. The document body and embedded links suggest a lure for users to download a potentially malicious file. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9252

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/can-u-get-free-robux-game-hack In PDF document text
    • https://www.audev.com/images/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://www.audev.com/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://audev.com/images/free-robux-without-human-verification_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_off0000210d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x210D 22080 bytes
SHA-256: 18e2ddad8b1d9eaf9398a99ccb2f5b6d1c3cd07da4605686a17c98d21d387c4a
font_01_sfnt_off00005212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5212 18532 bytes
SHA-256: 35bb0f01f69d1b5e790ed5f4c0eeb98998139975dc1eb58b588dc01b9002bbc1

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