Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47e1e58f43ddc75…

MALICIOUS

PDF

36.4 KB Created: 2021-05-25 07:31:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d52acaf123c81ac74fb4f728df02adae SHA-1: af139e67745403c57357f1862089faed7e7daccc SHA-256: d47e1e58f43ddc75d72360976efe0874079ded98e8f2b5aea4770f93c9211fd6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free coins' or 'hacks' for popular games. The document body and heuristics indicate a lure to download or access these cheats, which likely leads to malware or further malicious redirects. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/406889139/free-coins-for-coin-master-game-hack In PDF document text
    • https://kldcardio.ru/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://kldcardio.ru/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/free-spins-on-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
stream_002_off00003387.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3387 26028 bytes
SHA-256: 78078181c60d624dd4095cd951ccbb7e89e5af79551f535d093d3080af0f0e34
font_01_sfnt_off00006ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC6 17712 bytes
SHA-256: fd51fa1b849cf95139b510f282bcd47e41e352499df1938c7ca947a320e7b070

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