Malicious PDF — malware analysis report

Static analysis result for SHA-256 763af52f4ccb300a…

MALICIOUS

PDF

36.3 KB Created: 2021-05-25 00:00:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 45249c2e87b15a3d360c0e68753a65bf SHA-1: 3035637ebf43923d62f71201e8d9b705f45d4370 SHA-256: 763af52f4ccb300a1f9c414c52ffd1afc02d66e8742b29fd8de1330903270a85
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' lures for platforms like TikTok and Roblox. The document body and heuristics indicate a clear intent to redirect the user to potentially harmful websites, likely for further exploitation or credential harvesting. No scripts were extracted, but the embedded links are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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 https://netcdn.xyz/app/835599320/tiktok-free-fans-game-hack In PDF document text
    • https://www.imagevideo.info/images/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • https://www.imagevideo.info/images/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.imagevideo.info/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.imagevideo.info/images/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://www.imagevideo.info/images/free-spin-card-exchange-coin-master_GM406889139.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_off00003327.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3327 26216 bytes
SHA-256: 4b6b05789ccc36f52d16d9465ab96bfcc2377ee343dfdbf38b51621761bfeecc
font_01_sfnt_off00006e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E61 17684 bytes
SHA-256: 4a9e05c682d6810de0feb86162fa18badead57ff55ae6cc117977f414faa10b0

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