Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f78a3f8af0fde8f…

MALICIOUS

PDF

35.5 KB Created: 2021-06-28 20:48:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: dba368931c8a3fc10ad4606391a6f3fa SHA-1: 0a0502403d5a084ef729581861502c192017bdce SHA-256: 1f78a3f8af0fde8fb6cb09002df963ced43f6541cccf9e9b71a5392c1adb7a73
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The document body and embedded URLs reinforce this, indicating a social engineering attempt to trick users into visiting a potentially harmful site. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt.

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/comment-tlcharcher-un-cheat-sur-roblox-avec-explication-game-hack In PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-spins-and-coins-com_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/hwo-to-create-a-roblox-game-for-free_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coin-master-free-spin-app-iphone_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/toolbox-mod_GM479516143.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-robux-generatore_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/roblox-free-rpbux_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/minecraft-java-edition-free-trial_GM479516143.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_off0000314c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x314C 22760 bytes
SHA-256: e9d01a7c4cb6bdd9141455abfa3a08d1b8a985376282a79fda578c30e65351e9
font_01_sfnt_off00006472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6472 19568 bytes
SHA-256: d471f8c648dcda45664eb87d76d0c92b0f2f6303296ea12b51d131d20c9e0aac

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