Malicious PDF — malware analysis report

Static analysis result for SHA-256 14c0fde96bf342cf…

MALICIOUS

PDF

34.4 KB Created: 2021-06-28 22:22:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 874103d3e8f1ff4d5918c927426ec5b2 SHA-1: 31336290de873f35363046038dc88c6cfedd9c53 SHA-256: 14c0fde96bf342cfb2a72fafd1961e1ecab5d3f661b9509750e6dc44bd209450
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one pointing to a known malicious redirector infrastructure, disguised as a 'free generator / game hack'. The document body explicitly mentions 'Free Roblox Password With Robux' and includes the malicious URL. This suggests a phishing or scam attempt to redirect users to 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/free-roblox-password-with-robux-game-hack In PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/robux-gratis-hack-para-ordenador_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-hack-generator-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/android-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-shirt-maker-download-free_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-roblox-picture-that-makes-a-tshirt-look-cool_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/roblox-ftw_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/beat-this-obby-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/rbx-claim_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-free-gift-link-2021_GM406889139.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_off00002ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EBC 21956 bytes
SHA-256: 1316dd9f42c4f57adf0dc0a3cbe2330b408f023c473a3943aefe8a2a616f42cb
font_01_sfnt_off00005f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2E 19872 bytes
SHA-256: 976e37fef727889c9b1faebfc8ac47e87c007b43dde1090085ea9bcb597dbff7