Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b47e6d75e536ef0…

MALICIOUS

PDF

43.1 KB Created: 2021-05-22 08:04:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d13f093a7fa7b35232d85f4132240f90 SHA-1: 50857bdd579ea415a17d082b75234c651bf0b712 SHA-256: 3b47e6d75e536ef03826746195a1ac1ed4597ac14a7efec734c561b046723fdf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'free generators' for games like Coin Master and Robux. The heuristic firings indicate that the PDF is designed as a lure, leveraging game-related cheats to entice users to click on malicious links. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially harmful websites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8013

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/406889139/coin-master-free-spins-today-daily-links-game-hack In PDF document text
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000368b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x368B 25936 bytes
SHA-256: 83d1d98cbac2ada4119d95a4e64d3d7bcfde64218e9b88d64b07b14a902dc0ad
font_01_sfnt_off000070fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70FA 2956 bytes
SHA-256: aa05c93583c8bb1ea916fd69c8a28a5c303188c92667d4ae562bb4fa0c3eac9a
font_02_sfnt_off00007b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B1D 18652 bytes
SHA-256: 52d597ff4b9023df6b3510b92f87dc1d2329aed0448bc9fa59130058567cb992
font_03_sfnt_off00009e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E45 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088