Malicious PDF — malware analysis report

Static analysis result for SHA-256 77fa036a83c107ec…

MALICIOUS

PDF

34.7 KB Created: 2021-07-09 09:29:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 95ac39ad4f15a03af8ee9cd2c97c3b1c SHA-1: c401e44087f035975de7e3d5f9659962461088aa SHA-256: 77fa036a83c107ec3d76ea2ff68de77360572b85d77d63a218c89511839d58f7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure for game-related cheats and currency, directing users to a known malicious redirector. The embedded URLs and document body content strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious intent to redirect users to external, untrusted content.

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-spins-link-game-hack In PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/robux-hack-menu_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roblox-free-helmet_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roblox-cheat-enigine-cheat-table_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/hacking-tool-roblox_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-daily-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/180k-robux-hack_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/username-free-robux-site_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/cheat-engine-work-on-roblox_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-easy-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/como-hackear-el-pin-de-una-cuenta-de-roblox_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3215 22716 bytes
SHA-256: 165ef906b56c175de7a66ca1e521485b378468895e639a796aeb4c4c35508f17
font_01_sfnt_off000064e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E8 18344 bytes
SHA-256: 01b831504896dfaed35d51ec646485350627a831fcdd06f8660974e1004fbd35

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