Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bdc7714eeed589c…

MALICIOUS

PDF

33.1 KB Created: 2021-07-21 10:02:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 383bb35ff1bfd70fc9e1c567207f1866 SHA-1: e22652c8d121962efcd77394cecc81056d55914f SHA-256: 6bdc7714eeed589c4722249a702a2d5e7fc9715a499629f55d7ab7a5bf7a6d58
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector domains, including one specifically identified as malicious. The document body text and heuristic firings indicate a lure for free in-game currency or hacks, designed to trick users into visiting these malicious sites. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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.tw/app/431946152/free-robux-no-verification-no-download-game-hack In PDF document text
    • http://museumkk.ru/images/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://museumkk.ru/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://museumkk.ru/images/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://museumkk.ru/images/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://museumkk.ru/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://museumkk.ru/images/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://museumkk.ru/images/how-to-get-free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
    • http://museumkk.ru/images/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://museumkk.ru/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://museumkk.ru/images/coin-master-daily-free-spins-link-today_GM406889139.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_off00002a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A5A 22256 bytes
SHA-256: 755e3149bdbd45c4b5b397241f523072b900e0dede76903f830e21e0940ce846
font_01_sfnt_off00005c08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C08 19368 bytes
SHA-256: d3e2a0be71fa1195b8df5e17c1e8fb83919ae69834ad70429f1dcd21d008a8b3

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