Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4d02051d9683cd…

MALICIOUS

PDF

34.5 KB Created: 2021-06-29 06:55:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8d3ee0dbd5b417a6e8db592fe113c109 SHA-1: fea56d8b0f7831159a511e1558f8e801eda95c51 SHA-256: fc4d02051d9683cd7a72b268b8c56088ea6df67168b22e7d5357d0c20c0ccb82
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple embedded URLs that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier also flagged this PDF with high confidence. The primary attack pattern involves tricking users into clicking these links, likely leading to further malware downloads or phishing attempts.

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/free-roblox-bc-accounts-2021-game-hack In PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/cheat-roblox-client_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/free-game-online-to-download-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/roblox-cheat-script-auto-farm-super-power-training-simulator_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/roblox-cheats-admin-commands_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/anti-hack-plugin-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/hack-de-robux-100-real-imfinitos_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/best-jailbreak-hack-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/robux-no-human-verification-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/how-to-get-free-robux-without-buying-apps_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/how-to-hack-roblox-on-ipad_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/how-to-get-free-robux-without-hacking-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/proxy-hack-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/free-combo-list-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/sandra-how-to-get-free-tiams-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/free-robux-generator-no-human-verification-2021-real_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
stream_002_off00002fd8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FD8 22128 bytes
SHA-256: 879b1e4fb98b0d967bf15b1d211e24cf20865ee2c63c8a9d2d376b2750269486
font_01_sfnt_off00006104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6104 19296 bytes
SHA-256: 2b6b1ec5ab39d5e25458cf990a5d982432d6909d57753585ec3a9b2964835669

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