Malicious PDF — malware analysis report

Static analysis result for SHA-256 2359a6157cb3fd82…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 01:29:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: fa7c8980cf8d982ba5db6fccbe28263f SHA-1: 12ffe120a43cd91b8d8c733cb5c4fa08d5563bf9 SHA-256: 2359a6157cb3fd82cdb995d37773f469aa203b0be90ca84ddaecf522a4f29f57
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a 'free generator / game hack' which is a known malicious redirector. The document body and heuristics indicate a lure for game-related cheats, likely to download malware. No scripts were extracted from this sample, but the embedded URL is the primary indicator of malicious intent.

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/479516143/minecraft-free-exe-game-hack In PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-app-real_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/you-to-get-free-robux-no-hack_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-no-tsts_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-free-spin-and-trading-group_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-tokyo-ghoul-project-killzone-hack_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-sprite-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-free-spin_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-trolling-hack_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/abd-roblox_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/como-recuperar-mi-cuenta-de-roblox-hackeada_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-get-free-robux-on-roblox-pc_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/get-me-robux-for-free_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_off000030aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30AA 22908 bytes
SHA-256: d3af67e890cb8506a0477617fa181fb94eb298fc20535107978f889a20e3d491
font_01_sfnt_off0000640b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640B 18064 bytes
SHA-256: fa9a0de77dce9dd06b0f84dfed04fab8f04bd60753b2add307394953cc71c15a

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