Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4027f9f79295b14…

MALICIOUS

PDF

34.0 KB Created: 2021-07-06 02:41:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c15168b8fa08085cda69a067250fd23e SHA-1: 6d56a83cf04cc94dd7bde367db3f612ae254e4ab SHA-256: e4027f9f79295b14529a046b0a0f4c0c721b5a47619fc71984a4b81b9b7ecd75
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body and heuristics indicate a social engineering tactic to trick users into visiting a URL that likely leads to malware or further phishing attempts. No scripts were extracted, but the presence of malicious links and the lure suggest a phishing or malware distribution attempt.

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.tw/app/431946152/free-robux-download-game-hack In PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/hack-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/try-minecraft-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/free-robux-earning-website_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/how-to-get-roebucks-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/is-minecraft-earth-free_GM479516143.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_off00002eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EEE 21780 bytes
SHA-256: 416d8fb0b62a8ec7ac5f838ccab4bc18fc5b325ba2915cec6ce56c24f70f64da
font_01_sfnt_off00005ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF3 19296 bytes
SHA-256: 5f304289c35a5caca60ae5d5074bee34cff1925eeabd9956883fa8e616b1a204

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