Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecf5fcf53ceac5d4…

MALICIOUS

PDF

35.0 KB Created: 2021-06-29 03:14:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 482ae13e5e4c06e7bdb5ac99910a118a SHA-1: d421fe5c2fe29ff9d033fab385b89bd3643531ae SHA-256: ecf5fcf53ceac5d4a9ca72ace95ca80e44140d4a8e256a1b12540c05760e06fc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency, specifically mentioning Roblox and Coin Master. It contains multiple embedded URLs that redirect to malicious infrastructure, including a primary redirector at http://netcdn.co/app/431946152/roblox-robux-quick-easy-cheat-game-hack. The presence of these malicious links and the ML classifier's high confidence score indicate a phishing or scam attempt designed to lead users to potentially harmful content or further malware downloads.

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.co/app/431946152/roblox-robux-quick-easy-cheat-game-hack In PDF document text
    • http://pakoles.com/assets/CKImages/files/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/clean-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/original-roblox_GM431946152.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/free-harley-quinn-hair-roblox_GM431946152.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/coin-master-daily-free-spins-blog_GM406889139.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/is-tiktok-free-to-use_GM835599320.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

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_off00003104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3104 22088 bytes
SHA-256: cd76c74043522374121e06a9ae59065ba13d43fa2f2f4899c0698bd38be6628c
font_01_sfnt_off00006215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6215 19524 bytes
SHA-256: 5bb17e69657f8816622eb470bc00288d859ddbb1a99a1a117e7c781929664dec

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