Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9c2de8331329465…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 17:14:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 990d004633e39f7c58d5395369fd48cb SHA-1: d5b7a1bda81f23c32c296b01dd596c224356021a SHA-256: c9c2de833132946527a4ead1d88bafa2df677e298c77720e94d33f5338d62ebb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically a "free generator / game hack" lure. The document body and extracted URLs reinforce this, pointing to a URL known to host malicious content. This indicates a phishing attempt designed to redirect users to potentially harmful 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.tw/app/406889139/legit-coin-master-hack-october-2021-game-hack In PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/free-spin-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/urbx-club-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/try-minecraft-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/free-robux-working_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/www-free-robux-com_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/free-robux-mod_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_off00003176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3176 22080 bytes
SHA-256: a9ed2c5b1585a7597798af60636fb99237b69b89f8b98347538550763068cec6
font_01_sfnt_off00006274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6274 18564 bytes
SHA-256: d2139b6e896fba2bc6825783a40f2adf6174ceefae99483cb33ea8f3a396651d

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