Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a0a1c170bb3eea5…

MALICIOUS

PDF

52.9 KB Created: 2021-05-19 22:31:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: afb601ecd3e749ef14be96585913710a SHA-1: 55eab5da314de749dd97ad1b7988631fcea653f2 SHA-256: 3a0a1c170bb3eea5552162185758f8bbf59d70a0e618790bdb34d7e7bea5c5ca
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating it links to malicious redirectors, specifically advertising 'free generator / game hack' lures. The embedded URL https://netcdn.xyz/app/431946152/get-free-roblox-game-hack is identified as a known malicious redirector. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a URL consistent with the heuristic findings, suggesting a social engineering attempt to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9218

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/431946152/get-free-roblox-game-hack In PDF document text
    • https://www.sonestad.se/library/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-pubg-uc-free_GM1330123889.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-limiteds-roblox_GM431946152.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_003_off00004b5f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B5F 25704 bytes
SHA-256: 103cd427132457c4713f52d83040549ad269cd571741404fe9ad9c12f41238c2
font_01_sfnt_off000085ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85CE 12800 bytes
SHA-256: db399d969d9309c9c38cb6e3c43aa83c06d227a5470715de93176d1df1e6747d
font_02_sfnt_off0000adaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADAA 18052 bytes
SHA-256: 3163a373a79a6ba2b402f3bc3abf4e04b0a5713e8f73e060e65042d4a11df7ac

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