Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c5d7a34e3e1455…

MALICIOUS

PDF

33.8 KB Created: 2021-06-25 22:53:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fd2a394cca2ec6dde5468447f247a263 SHA-1: a63e59cb8013121a9d535d88d68d4566dcddd538 SHA-256: 38c5d7a34e3e145579076bd6be391083116422ef3d658ed98c2297732ea5e29b
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 'free generator / game hack' lures for Roblox. The primary malicious URL identified is http://netcdn.co/app/431946152/android-1-roblox-hack-game-hack. The presence of these links and the ML classifier's high confidence score indicate a phishing or social engineering attack aimed at tricking users into visiting potentially harmful sites.

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/android-1-roblox-hack-game-hack In PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-rixty-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/blox-fun-info-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/ariana-grande-break-free-roblox-id_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-hack-booga-booga-download_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/make-your-own-roblox-skin-for-free_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-ninja-animation-free_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/hack-to-get-money-on-bloxburg-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-hack-tap_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-how-to-make-a-anti-cheat-system_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/hacking-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-targets-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-free-gamepass-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-alts-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-mad-city-cheat-engine_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/dancing-sim-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-hack-anything-in-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_off00002d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D47 22324 bytes
SHA-256: 2ebad34d74688a66396e4b9bc70f07737b64e378d58e49e458af5a204db3a249
font_01_sfnt_off00005eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEC 19056 bytes
SHA-256: 5f5238352d8ff857eac3b7cec81d79fcbba72b58a5d28d2e71032402c91db628

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