Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef27493d8a71b21…

MALICIOUS

PDF

50.0 KB Created: 2021-05-14 11:05:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 81197d2d0863ec8ee6cac2e7145b16cd SHA-1: 733b4e1f3de876f5dd1fbda7702780435c42f6ae SHA-256: 5ef27493d8a71b212991315b2fd8eb4ff691b7885bad867ffa36257042e798fb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free spins' or 'game hacks' for popular games. The primary malicious URL identified is https://netcdn.xyz/app/406889139/get-free-spins-for-coin-master-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or social engineering attempt to redirect users to potentially harmful sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8594

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/get-free-spins-for-coin-master-game-hack In PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-robux-live_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/get-free-spins-coin-master-link_GM406889139.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e36.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E36 26132 bytes
SHA-256: 0e8699e8d06780fe9fc5ce08e492ead519a1e26fae1ed282daebb15859c1be56
font_01_sfnt_off000088e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88E4 4452 bytes
SHA-256: 5c864f935a548212ed27a18d47c315ac28f462ce267ce8d3aa4a81dce056121e
font_02_sfnt_off00009802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9802 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off0000a1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1F1 17884 bytes
SHA-256: 9bf67b2ee87cdcf37b0aaa2d40e70a5836dac1840b9be614bff5a3f1a0edfaa7

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