Malicious PDF — malware analysis report

Static analysis result for SHA-256 f778f21e1fe6af1c…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 17:00:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dceb70eb77d331f0699578fb2d97408e SHA-1: f315c9aae36957e68df9aca740e9e949002a9a7b SHA-256: f778f21e1fe6af1c4182899d3fd982c7318259e356a6305bec9ca6461d187fce
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free in-game currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn hosts further malicious PDF files. The document's content and embedded URLs strongly suggest a phishing or scam campaign aimed at users seeking cheats or virtual goods.

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/431946152/how-to-hack-roblox-accounts-game-hack In PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/how-to-get-free-hair-on-roblox-on-phone_GM431946152.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/how-to-get-free-robux-grayphiny_GM431946152.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/pokeballs-in-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/microsoft-robux_GM431946152.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/hack-roblox-descargar-pc_GM431946152.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/how-to-make-everything-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/free-play-online-roblox_GM431946152.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/snake-venom-roblox-hack-whitelist_GM431946152.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/free-spins-in-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/free-draw-roblox_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_off00002f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F56 21636 bytes
SHA-256: d72741aa1576bb50564bbf904d1dce8414fab5733670b11a83e5f23858a33daa
font_01_sfnt_off00005ef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF7 19064 bytes
SHA-256: 8c571bf80081aaa5c2be303b8c9fe18b31c5334a74c17f7b55d65649f5ee093a