Malicious PDF — malware analysis report

Static analysis result for SHA-256 576f75caa4fa9537…

MALICIOUS

PDF

37.9 KB Created: 2021-05-22 08:15:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cc7424ff5fd78d7fa0d20f36459ccbd0 SHA-1: 7aac379d7e4ca74924c5a9a54832e1cc85371761 SHA-256: 576f75caa4fa95373bd23dcbab462fd39dd17dd0221cac718a4e01466f9d0d71
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links, specifically targeting users with lures for game hacks and free spins. The document body explicitly contains phrases like 'CLICK HERE TO ACCESS COIN MASTER GENERATOR' and embedded URLs that lead to known malicious infrastructure. While no scripts were extracted, the PDF structure itself facilitates the redirection, likely to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7010

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/free-spins-coin-master-links-game-hack In PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/get-free-roblox_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002fee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FEE 24892 bytes
SHA-256: 62ae992893d47f7bc4381c90e970a7a164865fa2a9b2f13eac0e1d755571ef62
font_01_sfnt_off00006948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6948 2920 bytes
SHA-256: 601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7
font_02_sfnt_off00007362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7362 18056 bytes
SHA-256: 07f1a9832fff0ce02b8ea8bcbd6448fb7022c7ac6c85a00fb5b887865844234a

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