Malicious PDF — malware analysis report

Static analysis result for SHA-256 80ac66bf1b4f9b19…

MALICIOUS

PDF

34.5 KB Created: 2021-07-20 13:01:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0d6b5ac4fca607f66bceb02c38520eb7 SHA-1: 4808a68291f79f7e5548e081c14a099283879feb SHA-256: 80ac66bf1b4f9b19478dc45020a698c765a7353d6ca598d4d818360c4b9b3144
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link to a "coin-master-hack-without-verification" URL, indicating a social engineering lure to trick users into visiting a potentially malicious site. The presence of multiple related PDF links further suggests a campaign distributing such lures. While no scripts were directly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to lead users to a phishing or malware download page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/406889139/coin-master-hack-without-verification-game-hack PDF link annotation
    • https://w-i-r.de/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://w-i-r.de/images/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • https://w-i-r.de/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://w-i-r.de/images/free-tiktok-coins_GM835599320.pdfIn PDF document text
    • https://w-i-r.de/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://w-i-r.de/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://w-i-r.de/images/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://w-i-r.de/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://w-i-r.de/images/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://w-i-r.de/images/free-minecraft-maps_GM479516143.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
stream_002_off00003030.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3030 23288 bytes
SHA-256: 741fb8d59e69813843076e2a59621c2cc9114c4dd19c9110c4baf2dc7fa4ea48
font_01_sfnt_off000064c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C3 18356 bytes
SHA-256: dc73d1475286564dbbcfd7fe1f785306788ee44bec01666c46f1ad38f7aa2791

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