Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf7deecb4ba9255…

MALICIOUS

PDF

33.9 KB Created: 2021-06-27 21:01:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f440e41ee790d3fec860de128ef78347 SHA-1: 6ab4c5179480e03d3bc0a3070b83c9769891504e SHA-256: edf7deecb4ba925545abd08457b1b312bc63a1378af973804036a481f4c0c498
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free game passes for Roblox'. The ML classifier strongly flagged this PDF as malicious. The embedded URLs and document body content indicate a lure for users seeking in-game advantages, which is a common social engineering tactic to drive traffic to malicious 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-gamepasses-for-roblox-op-as-f-game-hack In PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/give-me-robux_GM431946152.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/unkown-cheats-roblox_GM431946152.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/robux-hacks-that-actually-work_GM431946152.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/cheat-roblox-menu-download_GM431946152.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/how-to-get-free-robux-it-really-does-work_GM431946152.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/coin-master-free-coins-and-spins-app_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_off00002f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F25 21792 bytes
SHA-256: e4badbb2ea59212c9c65060eb4118c8714c8ef3b711077f23793bffebafad5e9
font_01_sfnt_off00005f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F64 19088 bytes
SHA-256: 57fd1602cd0f90a30ee1d536add495607610ffad6263db89b42fa12b219bd835