Malicious PDF — malware analysis report

Static analysis result for SHA-256 c18dbb33fd313d76…

MALICIOUS

PDF

34.9 KB Created: 2021-07-02 00:00:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c419b11f227ef2b8e03b56fb96554141 SHA-1: ecb753350f8f1c049341f9849d5139c166041271 SHA-256: c18dbb33fd313d764e0b1a6cc77467db4b5a171678e4268f8fbd502fb298030e
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to websites that offer game hacks and in-game currency, such as Robux and Coin Master spins. One of the primary links, http://netcdn.co/app/431946152/free-admin-hack-roblox-game-hack, is identified as a malicious redirector. The document's structure and content strongly suggest a lure to download potentially malicious files or visit further compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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-admin-hack-roblox-game-hack In PDF document text
    • http://202.56.165.220/digilab/repository/roblox-adopt-me-hacks-2021_GM431946152.pdfPDF link annotation
    • http://202.56.165.220/digilab/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/free-face-roblox_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/hacks-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/opmu-roblox-hack-file-2021_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/free-robux-today-no-verification_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/wwwrobux-cheat-us-unlimited_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/real-roblox_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/how-to-hack-roblox-2021-mod-apk_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/roblox-hack-minecraft_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/how-to-get-robux-for-free-2021-july_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/how-to-get-free-cars-in-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/roblox-vamprire-hunters-2-wall-hack-download_GM431946152.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_off00002f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F43 22880 bytes
SHA-256: 862d2127af52c1ec79eb5a35225e4410345abf6e76f5eea099cb8c0c75d92024
font_01_sfnt_off000062b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B8 19376 bytes
SHA-256: 10b363443234dd5bede51a2035577eac959a4c8be8a22f1eea4654dfc4f37364

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