Malicious PDF — malware analysis report

Static analysis result for SHA-256 3358d1f9cc5300f5…

MALICIOUS

PDF

42.1 KB Created: 2021-05-16 05:21:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0ef51223f0eaad01dca57dd5e6cbe434 SHA-1: ff8317f914f10fb9f3243a35efca30122c75386b SHA-256: 3358d1f9cc5300f522adcb002fe282560371929dca576ae2d34ca11ef7c45a92
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting "game hacks" and "free spins" to lure users. The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links reinforces this assessment. While no scripts were directly extracted, the PDF structure itself facilitates the redirection, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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-generator-game-hack In PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/rbxdemon_GM431946152.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/cone-master_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/minecraft-pe_GM479516143.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/minecraft-kill-aura_GM479516143.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/demon-roblox_GM431946152.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-gift-link_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/how-to-get-free-robux-without-verifying-2021_GM431946152.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_003_off00004ccd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CCD 26044 bytes
SHA-256: 066f7c897e0aad93eb7b79a065fde34cee42bfb38403bb8215be13bc9c47a945
font_01_sfnt_off000087ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87EC 17884 bytes
SHA-256: 61e0f30a550a552155c2db6a7959ee396d6a34ca680bb4676c065f633eb1cbfa

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