Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1d448a1246ad3b3…

MALICIOUS

PDF

45.0 KB Created: 2021-06-02 22:07:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cfbc02e7109cb74b47bf7b07a2bc5608 SHA-1: 25da6bf7ff79cf861be19a30c4795d18a5e7fe7b SHA-256: b1d448a1246ad3b3ca5bbc9da349df78c0417ea15dbc41a7291e20e5e0e88104
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 game hacks' and 'free in-game currency'. The primary link directs to a URL associated with a Roblox game hack generator. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at redirecting users to potentially malicious websites, likely for further payload delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.xyz/app/431946152/roblox-bubble-gum-rainbow-shock-free-game-hack In PDF document text
    • http://uctovnictvosnv.sk/images/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/coin-master--hack_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/minecraft-hacks-ps4_GM479516143.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/roblox-free-shavacadoo_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/free-promo-codes-for-coin-master_GM406889139.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_off0000514d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x514D 26096 bytes
SHA-256: e501c6d616fbc272280f5351118f5037f9ca7ebe0bd29fa328a3ab82c7802dc7
font_01_sfnt_off00008ad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD4 19196 bytes
SHA-256: d124fa52117c29f6976e73abd21fd326fb31a2bd15ecf6bfab9a72135e9b486a

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