Malicious PDF — malware analysis report

Static analysis result for SHA-256 534239e1974299f7…

MALICIOUS

PDF

41.8 KB Created: 2021-05-14 06:01:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e0f070b743938342c3c22b8850d9dc61 SHA-1: 202c6cbe994b3725705f9146fc1e511bb4b12f7e SHA-256: 534239e1974299f7eb14e4977f20a6af8535266f071eda809e2e636180e0b698
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links to known malicious redirector infrastructure, specifically pointing to a "Coin Master Hack" download. The document body, though heavily obfuscated, contains references to game hacks and URLs that reinforce this lure. The heuristic firings confirm the presence of malicious redirector links and a general ML-based detection of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 3

  • 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/coin-master-hack-10.2.1-game-hack In PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/clean-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/easy-robux-hack_GM431946152.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/coin-master-heaven_GM406889139.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/where-to-get-robux_GM431946152.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/worst-client_GM479516143.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/free-spins-for-coin-master-that-work_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_003_off000048d7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48D7 24748 bytes
SHA-256: 01d9f800ca943ecbf0bf656d47e3b0822159e41da2a55ac7b15754968ad384ff
font_01_sfnt_off00008144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8144 18184 bytes
SHA-256: d583644d915bd171f19add23b0833aca52e77891297bd05357916fb27d6d46c1

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