Malicious PDF — malware analysis report

Static analysis result for SHA-256 243770dbba970d1f…

MALICIOUS

PDF

46.5 KB Created: 2021-06-02 07:56:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3c60e60213abf316a39ae7dad1353a69 SHA-1: d6fd0a8019416b6f0efb5b428aae04c07e8624ce SHA-256: 243770dbba970d1f5c881064d7dfbe66831efa35c743c3b6a3328ab908f5b28a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and sites offering game hacks and free items, indicating a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious. Although no scripts were explicitly extracted, the PDF structure itself contains embedded URLs and link annotations designed to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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/free-shirts-roblox-free-shipping-game-hack In PDF document text
    • http://mklista.ru/images/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://mklista.ru/images/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://mklista.ru/images/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://mklista.ru/images/vpn-for-tiktok-free_GM835599320.pdfIn PDF document text
    • http://mklista.ru/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://mklista.ru/images/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://mklista.ru/images/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://mklista.ru/images/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://mklista.ru/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://mklista.ru/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://mklista.ru/images/minecraft-java-account-free_GM479516143.pdfIn PDF document text
    • http://mklista.ru/images/coin-master-cheat-free_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://mklista.ru/images/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/minecraft-book-collection_GM479516143.pdfIn PDF document text
    • http://mklista.ru/images/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FF7 24348 bytes
SHA-256: b33d056f4d3de54a69badf590aefafdd51e8e4a16971596d9e9e528784ac55d4
font_01_sfnt_off000087cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87CC 2824 bytes
SHA-256: bd082aa73fbb1a8b3bd2e5c998d3d8e31d1dfc71ea36f846af746f69a0d2ab7f
font_02_sfnt_off00009180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9180 18804 bytes
SHA-256: 7b09802a244805f825a1c85fff77a02497b415df55cfb1ae63ed3f44c0eb65a7

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