Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e52a0fd1d27b47e…

MALICIOUS

PDF

34.2 KB Created: 2021-07-19 07:40:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a5d6fc784e326ce737f42d5051dbf302 SHA-1: d15339a9fc03b52e8b2bc85a5dae206f7b7f733d SHA-256: 5e52a0fd1d27b47e982b547ff0d2666b916057f2e6ada36ba1bedc467f93b771
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting 'free Robux' or 'game hacks' as a lure. The document body and embedded links strongly suggest a social engineering tactic to drive traffic to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://netcdn.tw/app/431946152/how-to-get-free-robux-without-verification-or-surveys-game-hack In PDF document text
    • https://ohsawamacrobiotics.com/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://ohsawamacrobiotics.com/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://ohsawamacrobiotics.com/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://ohsawamacrobiotics.com/images/free-tiktok-video_GM835599320.pdfIn PDF document text
    • https://ohsawamacrobiotics.com/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://ohsawamacrobiotics.com/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://ohsawamacrobiotics.com/images/free-robux-cards_GM431946152.pdfIn PDF document text
    • https://ohsawamacrobiotics.com/images/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://ohsawamacrobiotics.com/images/free-tiktok-likes-without-verification_GM835599320.pdfIn PDF document text
    • https://ohsawamacrobiotics.com/images/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002c46.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2C46 22844 bytes
SHA-256: 610bdaffe18bec284d96f4ad5e9133bd252b20aa5a646c94b7388eae5df7a25a
font_01_sfnt_off00005fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB6 19608 bytes
SHA-256: c4b40d882647ca438afa2539681b5ac4bc26dce61d3295ce86b6fc67a4011c31