Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e1ec64db36746b…

MALICIOUS

PDF

48.4 KB Created: 2021-06-07 06:03:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4b2b5908c40501b9f81b5aefc02ccc65 SHA-1: 7b6c7ca3d96f70d3256201ce9bf7cebc6d1f0928 SHA-256: 24e1ec64db36746b9990b7a41ecaaf56b4135dd3395f7810fc00f4e6b75a3f0a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to known malicious infrastructure, disguised as game hacks and generators. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the links and the PDF format suggest potential exploitation for client execution, possibly involving JavaScript. The document body contains garbled text and URLs, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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.tw/app/431946152/roblox-bubble-gum-leviathan-free-game-hack In PDF document text
    • http://sbm-nn.ru/images/www-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-daily-link_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spin-no-offers_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-change-your-username-on-roblox-for-free_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
stream_004_off0000522c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x522C 30600 bytes
SHA-256: bb2461d63cd6c4a40c5c3ff278ce39c600c9f943782222b50903c1fe3643f6a0
font_01_sfnt_off0000989c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x989C 19080 bytes
SHA-256: 4d590657265abbab828e64d20c2f7897da204949defe920768cd9b894e457151

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