Malicious PDF — malware analysis report

Static analysis result for SHA-256 13a609eb0128a76c…

MALICIOUS

PDF

33.5 KB Created: 2021-06-22 11:55:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 684b0f86cdce8ef5caaaedb62101735c SHA-1: bd9c3bbbacde26cd4524f827f40f2463e83e3348 SHA-256: 13a609eb0128a76c553eab6427389185072b09cb2b1217cb3809972ca6303640
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free in-game items for popular games like Roblox and Coin Master. The heuristic firings indicate these links are designed to lure users into potentially harmful websites. While no scripts were extracted, the embedded URLs and the nature of the lures strongly suggest a phishing or scamming attempt, likely leading to further malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/best-free-roblox-avatars-game-hack In PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/mcpe_GM479516143.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/roblox-free-pants_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/roblox-cheats-prison-life_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/gunslinger-hack-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/how-to-hack-admin-on-flood-escape-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/tuto-comment-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/hack-de-robux-rapido_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D68 22088 bytes
SHA-256: eb04898d7847ac5381444ffc71f76b0253a40adba4a0f61db17ed605dfd3a5a5
font_01_sfnt_off00005e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1E 18868 bytes
SHA-256: 541bb35ce56935718160a3bd328a1c6ca29784f6844c271859af746c9687ba9b