Malicious PDF — malware analysis report

Static analysis result for SHA-256 caee9d7c4b6caa15…

MALICIOUS

PDF

34.3 KB Created: 2021-06-27 18:19:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 6a4a3e5f91f6e9b1d2454ac1f10cc4b9 SHA-1: 0f69ad53dd3b350d89fcf070585d50979dc36917 SHA-256: caee9d7c4b6caa152726e3f117c0b409e90b6dde2833665b84f9cad96bd78393
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors and sites offering game hacks and currency, such as 'http://netcdn.co/app/431946152/how-to-get-free-robux-2021-pc-game-hack'. The document body and heuristics indicate a lure for free game items, likely leading to further malicious downloads or phishing pages. No scripts were extracted, but the embedded URLs and the nature of the lure strongly suggest a malicious intent to redirect users to harmful content.

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/how-to-get-free-robux-2021-pc-game-hack In PDF document text
    • http://perpus.ar-rum.ac.id//repository/download-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-roblox-accessories-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-cheat-engine-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-cheat-enjen_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/i-hacked-yogssmacky21-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/roblox-free-download_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-hacker-beta-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-hack-menu-apk_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/how-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/infinite-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/como-hackear-todo-os-vehiculos-en-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coins-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/instagram-coin-master-free-spins_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_off00002e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E6F 22068 bytes
SHA-256: de7179bfe224c604f67acad182825cfc390bb6c770bad4d2b1e174341c9692d0
font_01_sfnt_off00005f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4A 19540 bytes
SHA-256: 7aad6e6f72e368f7f9daef11c7068a585db164eea3f7ec780565f64cce40aca9

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