Malicious PDF — malware analysis report

Static analysis result for SHA-256 d316da76580f7510…

MALICIOUS

PDF

50.4 KB Created: 2021-06-07 00:03:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ad464398cc23bd0b12638287d4e3f208 SHA-1: 772543f68b6f49bd3e93c303f954785fe312fce4 SHA-256: d316da76580f751078646397379cfba96570b6818f71db949840945f72417c55
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier strongly flagged this PDF as malicious. The document body contains a lure claiming a Roblox account hack, directing users to a URL that likely hosts a phishing page or malware. While no scripts were directly extracted, the presence of embedded URIs and the overall suspicious nature of the content suggest an attempt to trick the user into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.tw/app/431946152/my-friends-account-on-roblox-has-been-hacked-game-hack In PDF document text
    • http://proyetec.com.co/aym_image/files/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

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_004_off00005550.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5550 31792 bytes
SHA-256: c1694a51ce29106c2e9a9b0b815cdfdec477eb045bb978aa3186c8a4e960688e
font_01_sfnt_off00009fd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FD6 19260 bytes
SHA-256: 22884fc65c29d9c8fa2ffb0c9f185f2eb4f5bc404cc58a30d5f4e54330d43ce4

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