Malicious PDF — malware analysis report

Static analysis result for SHA-256 6af1831a69b7b1ae…

MALICIOUS

PDF

44.4 KB Created: 2021-06-11 00:57:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e57e932fc4ee67734f89acf328cbde3b SHA-1: 180372c7f1cd2e1046b0d589986db3b20bb6b6c3 SHA-256: 6af1831a69b7b1aee431939bb8b695c4b1b394c5e23137c2ad3ae11bea45a4ba
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a game hack redirector lure, pointing to a malicious URL. It also displays a fake CAPTCHA, a common social engineering tactic to prompt user interaction. The embedded URL is likely intended to lead the user to download a second-stage payload or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.tw/app/431946152/roblox-icebreaker-cheats-game-hack In PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-give-yourself-robux-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/pokemon-go-free-2021_GM1094591345.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/real-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-blogspot_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-apk-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/rbx-place-free-robux_GM431946152.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_off0000510c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x510C 24968 bytes
SHA-256: 381cb54b6c07d865764f220da2381e5ad41d68aeef9d2cdd92f2d1dd8115dd1f
font_01_sfnt_off00008a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A30 18452 bytes
SHA-256: e0b9fca862e3092d42f4bfe0ff1305122a61935341b2ac649a916cb9a06bb79e

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