Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b01ca1310715252…

MALICIOUS

PDF

47.2 KB Created: 2021-06-07 16:50:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a151e845b674af88c1fc955eb31f8370 SHA-1: aa1d8bf7076aa05b92491495f3b46c77d6248361 SHA-256: 9b01ca1310715252e28d68c244866343d6e0890e8950a0802d6d54ad0f659f91
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://netcdn.tw/app/431946152/free-robux-games-online-game-hack PDF link annotation
    • https://www.summerland.com.tw/upload/files/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-free-online_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/minecraft-login-free_GM479516143.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-gift-hack_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-gen_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/real-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-hack-pubg-mobile-uc-without-human-verification_GM1330123889.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-ios-hack-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fb6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FB6 26736 bytes
SHA-256: cfd52372c974fa11bccbb470e2154febd64c7a02a4c7fbf053377ea57aab3a12
font_01_sfnt_off00008aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAB 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off0000945a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x945A 18696 bytes
SHA-256: a5d7981b7262b31c25c88d7fb7213c7b89c092023588023e4305c19d6f4d8df2