Malicious PDF — malware analysis report

Static analysis result for SHA-256 28b5a18126ae52d1…

MALICIOUS

PDF

34.6 KB Created: 2021-06-25 19:50:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5bc8b8f7a95c1324f58c6bea1ebae091 SHA-1: e781c77f5c3d6e7b7419e06e4289d3da9cdb9cbc SHA-256: 28b5a18126ae52d1f0435226eca19d7d8b76f4a3b3d7f972931b43d885c16a2e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free generators to trick users into clicking malicious links. The primary link redirects to known malicious infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful content or further stages of an attack.

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/free-interview-in-roblox-studio-game-hack In PDF document text
    • https://dr-willmer.de/images/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/roblox-game-download-for-pc-free_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/roblox-hacking-tools-reddit_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/no-download-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/free-robux-script_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/invisible-hack-roblox_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/free-items-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/get-money-roblox-free_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • https://dr-willmer.de/images/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/how-to-hack-get-money-in-roblox-tycoon-simulator_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • https://dr-willmer.de/images/hacks-for-boulevard-roblox_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/make-free-robux_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_off00002eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB2 22460 bytes
SHA-256: 304adedc35a73d317fb24ef2b4388be16c11c8bd6a2dee9fde9321726bab72d9
font_01_sfnt_off00006108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6108 19468 bytes
SHA-256: e2a452d07f34394798fd11ddb411a362c3c90d9d8464fe7cbb365c98278df6d1

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