Malicious PDF — malware analysis report

Static analysis result for SHA-256 e25171071f7c67e4…

MALICIOUS

PDF

32.4 KB Created: 2021-07-19 23:20:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 51e6d2c4e9773553f5cdbbff78d3c09d SHA-1: ecee50c7c0d78f2b93a1553fcb45f2599e876f89 SHA-256: e25171071f7c67e4118d80655bc514080478cb5a935583690d6bf1b104b1abc1
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The ML classifier strongly flagged this PDF as malicious, and heuristic rules indicate it's designed to lead users to known malicious redirectors. The embedded links likely serve to download or execute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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-accounts-game-hack In PDF document text
    • http://solidcom.ch/images/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://solidcom.ch/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://solidcom.ch/images/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • http://solidcom.ch/images/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://solidcom.ch/images/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://solidcom.ch/images/robux-free-co_GM431946152.pdfIn PDF document text
    • http://solidcom.ch/images/get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://solidcom.ch/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://solidcom.ch/images/free-college-textbooks-tiktok_GM835599320.pdfIn PDF document text
    • http://solidcom.ch/images/how-to-get-hacks-on-roblox_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_off00002acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ACC 22372 bytes
SHA-256: 971c9e1bae638afefa9e0f543084b5f2ac3736158dc4376b96a5082bf694f2c3
font_01_sfnt_off00005c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C8F 18304 bytes
SHA-256: c204acef3e551231e5c23dbfbb2d775467b579b40a97e419668be00c01df0aed