Malicious PDF — malware analysis report

Static analysis result for SHA-256 4214cd1418b486f9…

MALICIOUS

PDF

42.1 KB Created: 2021-05-13 04:02:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 904aa0daa51d15a813e91c03974e18ff SHA-1: f785406070070329a600729716bbb3027b3ac5d9 SHA-256: 4214cd1418b486f91d9a725105ef99e4c1bd2610ce265dd44b9e79a5897505ac
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures for game hacks and free currency, such as 'minecraft-wurst-client-game-hack'. The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, contains URLs that are consistent with phishing lures. No scripts were extracted, but the embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/479516143/minecraft-wurst-client-game-hack In PDF document text
    • http://www.hlad.hr/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-free-spins-daily-link-game-mod_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/minecraft-win-10-free_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/what-is-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
stream_003_off000049a1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49A1 25312 bytes
SHA-256: b85ff840d744447a33f89601b736767615dcb64f46f793746fe28f5da849edf2
font_01_sfnt_off00008312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8312 17980 bytes
SHA-256: da8de394074f4ca1a4d818326f6763942cae13e643f91f1376333b749e0c27ab

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