Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d6ee072007c70e7…

MALICIOUS

PDF

47.5 KB Created: 2021-05-19 01:00:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 76a287247686fc45024fda470b5d27a7 SHA-1: 9b532b837d6f10b898fd07c81486ec642f3b10f1 SHA-256: 4d6ee072007c70e7321c456133e05702da638307bd2e56ff23d25383d8f33842
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for free game currency and hacks, with a critical heuristic firing for a malicious redirector link. The embedded URL leads to known malicious infrastructure, likely to serve a second-stage payload or phish for credentials. No scripts were extracted, but the document's structure and heuristics strongly indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/free-coin-master-gold-cards-game-hack In PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-rewards_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-group_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-app_GM406889139.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
stream_003_off00004ee6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EE6 25396 bytes
SHA-256: a678442ebcc04fb89c87437c5bfbc259709400f0021e1865b489b8178a81bedf
font_01_sfnt_off00008a11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A11 4180 bytes
SHA-256: cfa3b7ada7411a111099c8cdff336dcd589437bb2be6273aaf3d4587fb1f979f
font_02_sfnt_off0000982f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x982F 17960 bytes
SHA-256: 8682528a83dd112d81181b55b0947f4d42ad7746a23a86464d464a09275f8c19