Malicious PDF — malware analysis report

Static analysis result for SHA-256 c71825222d43185c…

MALICIOUS

PDF

34.3 KB Created: 2021-06-17 18:56:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1e8e09658b4b854c76e8336f02c5cb38 SHA-1: 043ed6e6835762072609ff3c099845da383a0c9e SHA-256: c71825222d43185c81afe34af75f48a77bcfde496f5105497eba193079419a2b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "free generators" or "game hacks" for popular games like Roblox and Coin Master. The document body and embedded links strongly suggest a phishing or scam attempt to lure users to malicious websites, likely for further malware delivery or credential harvesting. No scripts were extracted, but the presence of malicious links and the lure content are sufficient indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/how-do-u-hack-someone-on-roblox-game-hack In PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/descargar-roblox-hackeado-con-robux-infinitos_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-map_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-hack-roblox-catalog-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF1 21964 bytes
SHA-256: 3fec590a09d4bc8a054dc189def45d0351b0a8a6b4b8599e0dbe362b6b1df105
font_01_sfnt_off00006076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6076 19248 bytes
SHA-256: 76edaf10676f7fc55ac10b58a40d59ea531623d1b44e12b88666cb506bd01027

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