Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc9827a441fe211d…

MALICIOUS

PDF

33.9 KB Created: 2021-07-09 08:28:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e6dbbae046ce6adc5dfe9bb3bf88e8e4 SHA-1: 6c2cea77dfdcff76ebb93eb8ae80de8bf02586a5 SHA-256: cc9827a441fe211dacbf8a898c1897109ffd8954db43e7179de7f904b56a73a3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free currency for popular games. The primary lure URL is http://netcdn.tw/app/479516143/how-to-install-minecraft-for-free-game-hack, which is identified as a malicious redirector. The document body and heuristics indicate a social engineering tactic to trick users into visiting these sites, likely leading to further malware downloads or phishing.

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/how-to-install-minecraft-for-free-game-hack In PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-robux-on-website_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/robux-com-for-free_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-roblox-promotion_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/roblox-play-now-for-free-no-download_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-cards_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-free-coins-link-facebook_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-tix-generator-roblox_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-robux-pc-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/roblox-speed-hack-download_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/how-to-get-robux-hack-free_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/minecraft-nintendo-switch-digital-code-free_GM479516143.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_off00003282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3282 21832 bytes
SHA-256: b273d8ff074eff6d3f7754434dc0bd7567751823d755ab90dc6fea90fb37967d
font_01_sfnt_off000061f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F9 18236 bytes
SHA-256: 80f9f3d3ddf194f52a7f748b585b61cd03432ad9892c468e4e347190080fe4ef

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