Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd16e53adecb6e50…

MALICIOUS

PDF

34.5 KB Created: 2021-06-19 04:01:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 487835e908b53cc1f43d36e350b924b8 SHA-1: aca78efb82a1e23d6d733e2095dfd7d01985ead8 SHA-256: dd16e53adecb6e50e9c79e43ddd156753f4196bb8fffa9f09b9ab7c94fa18893
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising game hacks and generators. The primary lure URL is http://netcdn.co/app/431946152/roblox-assassin-hack-exploit-game-hack, which is associated with known malicious redirectors. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites. No scripts were extracted, but the presence of malicious links and redirectors strongly suggests a phishing or social engineering attack.

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/roblox-assassin-hack-exploit-game-hack In PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/coin-master-free-spins-link-31-march-2021_GM406889139.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/how-to-cheat-infinite-jump-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/robuxfree-con_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/how-to-hack-roblox-games-easy_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/mod-pack-for-free-for-roblox_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
font_00_sfnt_off00003154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3154 21928 bytes
SHA-256: 160721f1dc207b9d3724252ae7253194b32b7217e1104f6d978f1d1f524a424a
font_01_sfnt_off000061a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A4 19056 bytes
SHA-256: 764b48e8a2b4edb8c6d9b718c4e2bcf474ba73fdfbb48b4c7e66664f8dc0ddb4

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