Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf72e6f9fc383cff…

MALICIOUS

PDF

33.0 KB Created: 2021-07-08 19:07:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 41ff0a5fe53bb10f8e1ce39818a9f770 SHA-1: e619b62057b238377293e52225157e22a4d92102 SHA-256: cf72e6f9fc383cff7114f026f0543452e42cfd0e1f954c2fbf0231a5d48315fd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to a malicious domain, promising free game currency or hacks. The primary lure URL is http://netcdn.tw/app/431946152/free-2021-robux-game-hack, which is flagged as a malicious redirector. The document body and numerous URLs reinforce this theme of free in-game items, indicating a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/431946152/free-2021-robux-game-hack In PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/coin-master-freebies_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/roblox-free-mvp_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/roblox-hack-in-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/arsenal-roblox-hack-2021-august_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/free-robux-live_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/rob-hacker-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/free-minecraft-java-account_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_off00002b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B2B 21996 bytes
SHA-256: fb9d7aff4717bdb4bfc3a5f3ddd5e6cdc6f779372a101bd1d077266303e8c3ee
font_01_sfnt_off00005bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD3 19116 bytes
SHA-256: af14d1fa5b4f919e14fbfd2207fee29f86c7e1258ad11836ead4aea48baef512

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