Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4adf961ed34eba9…

MALICIOUS

PDF

43.7 KB Created: 2021-05-19 19:53:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a69d5c1844adbcad6cfcad3f0e009ca1 SHA-1: 35c5fd420bad91412da2a075cb0d763ace12e0da SHA-256: a4adf961ed34eba90f153fa2279a1b9ff3d44ac349161c69f716a02a54b67e78
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and websites offering "free generators" or "hacks" for popular games, indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest an attempt to lead the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/1094591345/pokemon-go-free-3d-game-hack In PDF document text
    • https://www.taline.hr/files/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
    • https://www.taline.hr/files/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/100-robux_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/pubg-uc-logo-png_GM1330123889.pdfIn PDF document text
    • https://www.taline.hr/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://www.taline.hr/files/cm-free-spins_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • https://www.taline.hr/files/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.taline.hr/files/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • https://www.taline.hr/files/roblox-people-girl_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/best-free-robux-sites_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_off000047e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47E7 24220 bytes
SHA-256: c47a6fec424ea77b18784458f1d4b333df99be40a01c23c7f593e9a4269b9466
font_01_sfnt_off00007eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFF 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000088b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88B1 18192 bytes
SHA-256: 24cf9286edf2b7a27fca969e9ab8cced3aa265a7077f05d02b8bfcca92541d97

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