Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0cb55a1ea2113f9…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 20:22:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5c15222e962f3d9a4123835d06d34c06 SHA-1: 0cb80838efe1a0d6632e88cbb666b26df920e79a SHA-256: e0cb55a1ea2113f9f26eae011323e7d8731d3314e2634604f60be0763aa52e54
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link disguised as a game hack generator, which redirects to a known malicious infrastructure. The ML classifier strongly indicates maliciousness. The document body and heuristics suggest a lure for game-related cheats, likely leading to a phishing or malware download site.

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/coin-master-free-coins-game-hack In PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/roblox-ban_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/how-can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/free-robux-link_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/coin-master-hack-spins-and-coins-unlimited-free-download_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
stream_002_off0000335e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x335E 23040 bytes
SHA-256: c10e0030333f4b36e1836c28c87fe83e79ddecb68bc7520a237638c6b8556d9b
font_01_sfnt_off0000672a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672A 17996 bytes
SHA-256: 2ec206c530faa3d40eac36f14655b3e9b935e9ff12c648634e177d5bc9421463

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