Malicious PDF — malware analysis report

Static analysis result for SHA-256 698d89842a7484cf…

MALICIOUS

PDF

34.4 KB Created: 2021-06-25 02:35:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 1abe84a6fbf6b6e95d99f2de18751280 SHA-1: 0d52da2b06d37c06314cea8a8d5aaedce96fd39a SHA-256: 698d89842a7484cf42e1baa5c02faec43b43fc01bff58345a1b8fcc84997ee82
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector pointing to 'http://netcdn.co/app/431946152/demon-hack-roblox-pastebin-game-hack'. This link is presented as a 'free generator / game hack', indicating a social engineering lure to trick users into visiting potentially harmful sites. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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/demon-hack-roblox-pastebin-game-hack In PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/get-coins-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/village-4-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/robux-freebies-hack_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-use-cheat-engine-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/roblox-synapse-hack_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/wurst-client-18-9_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/mega-co-nz-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/flame-roblox-exploit-free_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/can-you-trust-rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/www-robux-com_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_off00002de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE2 22488 bytes
SHA-256: 68c6efe3f8ace5696ab859dd487fd68002a629258277aed71bc651253dd21658
font_01_sfnt_off00006005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6005 19460 bytes
SHA-256: b3530f7b1adb38b92d273b8f73806a8560753d1b7317a4019cf9ef45b9f1439e

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