Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7235c481b635fa4…

MALICIOUS

PDF

41.9 KB Created: 2021-05-21 13:13:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3f051b8c6bd8445bb8e5927d89a98e67 SHA-1: 7b98e4366b36a4e27ad93c801ae38533bbb015bf SHA-256: d7235c481b635fa4b5fc0499c8700fd1de3f00d468aa1e214da19de64f74443e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as offers for free Robux or game hacks. The document body and embedded links strongly suggest a phishing or scam attempt, aiming to redirect users to potentially harmful websites. No scripts were extracted, but the presence of malicious links and redirector lures indicates a high likelihood of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7466

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/431946152/free-robux-accounts-game-hack In PDF document text
    • http://linens.kiev.ua/images/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/play-coin-master-online-free_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-robux-2021-no-human-verification_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000033a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33A4 28444 bytes
SHA-256: 6684772720fda43783f7535e38d7bc98175682f35869e30124ceb51722a86a1a
font_01_sfnt_off00007403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7403 6264 bytes
SHA-256: 98611db8da8803e1bf2a12b716b154249e7ee9a3411a37f6d0a8744510e880a9
font_02_sfnt_off00008316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8316 18120 bytes
SHA-256: ef72730342a71d63428e939ae8b3e53b657bfaebcd113dd5195284c27a8ef9c4

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