Malicious PDF — malware analysis report

Static analysis result for SHA-256 acd691be51ca2613…

MALICIOUS

PDF

43.7 KB Created: 2021-05-15 11:09:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 942483a777306c0c0e3b220c46b8489c SHA-1: efd7f8a6bedf9f005eaf26bfd0bde053c9e0af69 SHA-256: acd691be51ca261353513fdc0a3211fb5f3a9032a9342481045680bc84e54966
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs and a visual download button lure, suggesting it is designed to trick users into downloading further malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous game-related download links indicates a common phishing tactic. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/coin-master-free-rare-cards-game-hack In PDF document text
    • http://sd-olimp.hr/files/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/android-coin-master-3433-apk-hack_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/clean-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://sd-olimp.hr/files/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/coin-master-download-hack-ios_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049c8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C8 27604 bytes
SHA-256: b493528e181a367194cedfe884ea31ac8b9f582fd91cf600cffac94416a37ae1
font_01_sfnt_off000089d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D0 17884 bytes
SHA-256: 13dc291ccbae0e6dfc42c40dac8b965d117c1bc6200047bd2049e93e12a4bb63

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