Malicious PDF — malware analysis report

Static analysis result for SHA-256 30cdd7323fa4fa91…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 16:07:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: cba67f170be054edc3e72913b7b8f881 SHA-1: fc2c13dd9a1bd1e1fc433649ffc1b4654375c71d SHA-256: 30cdd7323fa4fa91eeab24247f8ad95a6b5cebef86cd1b9f71ffb48b1d387d9b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and generators. The primary lure appears to be a 'Minecraft Pe Hacks 2021' generator, directing users to the URL http://netcdn.tw/app/479516143/minecraft-pe-hacks-2021-game-hack. This suggests a phishing or scam attempt designed to trick users into visiting potentially harmful sites.

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-pe-hacks-2021-game-hack In PDF document text
    • http://ycstamping.com.tw/image/data/files/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-hack-no-download-no-survey-no-offers_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/cheats-coin-master-free_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-free-robux-just-by-inspecting-it_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-hack-roblox-accounts-with-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/fly-hack-in-eny-roblox-game-phone_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/test-all-free-roblox-gear-free-admin-ban-scripts_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-games-with-free-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-look-cool-on-roblox-free_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/wwwcoin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-hacks-for-tablet_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-april-fools-hack_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_off00002f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F8E 22924 bytes
SHA-256: abc2f8e0138773c7890e09ac825cff7f38d7efd595a5b88bf5f4eae118972080
font_01_sfnt_off000062b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B1 18580 bytes
SHA-256: 4f1a648823b78734f4c2f4307c349e49cb3bfd5b784a9f97249a409e527b1611

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