Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4a33adb18637b2b…

MALICIOUS

PDF

34.3 KB Created: 2021-07-09 06:27:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dabd622f729d00f97bbd8b277ace6111 SHA-1: 9290126e4da9ec465a8a441748e0ae3276c457e6 SHA-256: d4a33adb18637b2b61bcbb0900104f409a268f3ce6e1876de2f646daf7e6efa3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a known malicious domain, masquerading as game hacks and free generators. The document body and heuristics indicate a lure to download or access potentially unwanted or malicious content. No scripts were extracted, but the primary attack vector is the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/406889139/coin-master-cards-for-free-game-hack In PDF document text
    • https://financia-business-school.com/static/upload/files/free-unicorn-code-roblox_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/free-rare-name-generator-roblox_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/coin-master-hacks-xyz_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/roblox-sniper-script-hack_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/new-roblox-bleu-level7-hack-exploit-best_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/claimrobux-net_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/roblox-cheat_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/code-free-robux_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/is-roblox-a-free-game_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/pubg-uc-buy-paytm_GM1330123889.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/how-ti-get-free-clothes-with-no-robux_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
font_00_sfnt_off00003114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3114 22712 bytes
SHA-256: 9f9221299b27e73b87f48dce6a6be0f8c90d75bef58b47f9787f9f21aae8faad
font_01_sfnt_off000063a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A3 18172 bytes
SHA-256: 51a6fa1d0322029b9e2ca075150f5a08b3c54d54cadd2367ada3da490e26397a

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