Malicious PDF — malware analysis report

Static analysis result for SHA-256 38245a804b5e49a4…

MALICIOUS

PDF

35.2 KB Created: 2021-06-22 03:35:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 29a5601381ff9b7baef04e07acef3093 SHA-1: 984e730457e6e725f4a3946fb3b91bc702e592b3 SHA-256: 38245a804b5e49a4bae1accd575a0df79258e42d2cb4718f83109a92d7cd1c99
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a critical heuristic firing for a game hack redirector lure, directing users to a suspicious URL. The document body and embedded URLs also point to similar game-related lures, reinforcing the social engineering aspect. While no scripts were extracted, the presence of malicious redirector links and the lure suggest an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting.

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/406889139/coin-master-hack-apk-july-2021-game-hack In PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-free-download_GM479516143.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/game-toolbox_GM479516143.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/como-generar-coin-master-free-spins_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000318f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x318F 22636 bytes
SHA-256: 72d9fbcd620d5d3829dd7bc3690506cd7e2fa16b4a135f2ae63b6e8360664f34
font_01_sfnt_off0000641f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641F 19140 bytes
SHA-256: be5c43c74bc19b4a02d5512ddc471c16ecd3e0fd6fcc29a5737e08cb61c294c7

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