Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec855853cd0ed823…

MALICIOUS

PDF

33.8 KB Created: 2021-06-22 23:58:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4ccfb373aad3b8e9665c741292edeeb2 SHA-1: 27edd228c65132f7088bb3d3e2f7317aeb42be32 SHA-256: ec855853cd0ed8235337c83ed5fda6a9f4953d194de2af023438301569771dc6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links, specifically targeting users with lures for game hacks and generators. The primary malicious URL identified is http://netcdn.co/app/479516143/scaffold-minecraft-hack-game-hack, which is flagged as a known malicious redirector. The document body, though partially corrupted, also contains this URL and other links related to in-game currency or hacks, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/479516143/scaffold-minecraft-hack-game-hack In PDF document text
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/minecraft-switch-free_GM479516143.pdfIn PDF document text
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/coin-master-200-spin-link_GM406889139.pdfIn PDF document text
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/pubg-uc-lebanon_GM1330123889.pdfIn PDF document text
    • https://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/free-robux-game-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/pokemon-go-hack-free-download-ios_GM1094591345.pdfIn PDF document text
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
    • https://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/free-robux-exploit_GM431946152.pdfIn PDF document text
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/roblox-robux-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/free-roblox-cookies-discord_GM431946152.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
font_00_sfnt_off00003280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3280 21360 bytes
SHA-256: 53613898ce71dd8aa41272c4354d4e19cac7392078938e17b1838c8022b39a97
font_01_sfnt_off00006125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6125 18416 bytes
SHA-256: 9b92067fa4c44ca875f0f74c7263e73a9dafc9ca5c6c8fe94a9a1870cb753e0d

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