Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc65b35c226d4896…

MALICIOUS

PDF

43.0 KB Created: 2021-05-19 05:17:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 91c360c611aa7897855f95f9c1f82f8a SHA-1: 5220facd494fbc1d3f8616d964096bdd26471d8a SHA-256: dc65b35c226d4896e2ff9800604bc6a0c72b0715286ba1bb4302ea7731ae3978
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising free game generators and hacks. The document body, though heavily corrupted, contains references to 'Roblox Avatar Free' and URLs that align with the heuristic findings. The primary malicious activity observed is the redirection to external sites designed to lure users into potentially harmful actions.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/431946152/roblox-avatar-free-game-hack In PDF document text
    • http://www.hlad.hr/files/hack-to-send-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/mcpe_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/hey-google-how-do-you-get-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/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-app_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/can-i-have-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_off00004942.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4942 25844 bytes
SHA-256: 9b4ffdd79e20a50be097d88437bc6ef32c935d69180fdf8839161010081399ae
font_01_sfnt_off00008524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8524 18396 bytes
SHA-256: fabbc4d33b4fd44a10480a095a1b5872a696080c7c42ded8a290903470f97fc4

Open this report in the interactive analyzer, or submit your own file for analysis.