Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbcd99b4cb3b9683…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 21:57:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cec83258b3f8522fe57341635c349987 SHA-1: 6d3e8498953fd0b252fc70b1a1247f91cd077cdf SHA-256: fbcd99b4cb3b96836085801fdd697a9b5f661b074f8fae1df353ad817a44738a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the presence of known malicious redirectors. While no scripts were explicitly extracted, the document's structure and embedded URLs suggest an attempt to trick users into visiting potentially harmful sites, likely for credential harvesting or malware distribution.

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.tw/app/479516143/free-minecraft-maps-game-hack In PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-online_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-cheat-on-boxing-simulator-2-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-hack-ultimate-driving-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/roblox-xeno-hack_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/comment-avoir-robux-gratuit-2021-sur-pc-facilement-free_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/play-games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/ccv3-roblox-hack-how-to-through-walls-new-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-bighead-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-get-any-item-in-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-hack-roblox-apocalypse-rising-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-hack-robux-vidos_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-please_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_off0000317f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x317F 22028 bytes
SHA-256: 0215f717620f9c0b440d15f649801ae450cfb8d92a319d95e99eef5a903aae79
font_01_sfnt_off0000623b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623B 18032 bytes
SHA-256: 831359ab32c83bb6c3c53a9b76d1176a195f842dbc2e51818f0e62b8083e239a

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