Malicious PDF — malware analysis report

Static analysis result for SHA-256 718d271446b7bdea…

MALICIOUS

PDF

41.8 KB Created: 2021-05-10 15:12:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7a2a6252b200cacbcf5869e5671f4d14 SHA-1: 3bfb10d2eb55462fd0869290e0a2ffc73620b625 SHA-256: 718d271446b7bdea646a0b98ff67b1593a3e2917d5a63453b5284f2d66be5c94
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites, including a known malicious redirector at `https://netcdn.xyz/app/431946152/free-roblox-adopt-me-accounts-game-hack`. The document body and heuristic firings indicate a lure for free game items or accounts, designed to entice users to click these links. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 https://netcdn.xyz/app/431946152/free-roblox-adopt-me-accounts-game-hack In PDF document text
    • https://brainpads.com/images/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://brainpads.com/images/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/minecraft-net-free_GM479516143.pdfIn PDF document text
    • https://www.brainpads.com/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.brainpads.com/images/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
    • https://brainpads.com/images/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/coinmaster-hack_GM406889139.pdfIn PDF document text
    • https://www.brainpads.com/images/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • https://www.brainpads.com/images/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/free-coin-master-spins-and-coins-for-daily_GM406889139.pdfIn PDF document text
    • https://www.brainpads.com/images/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/coin-master-60-spins_GM406889139.pdfIn PDF document text
    • https://www.brainpads.com/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://Buy.HoaxMC.comIn 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
stream_003_off00004705.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4705 24532 bytes
SHA-256: eb41a6dccc141c0248491d751e58317dadf736f3de1656edb8ed56f614c9e979
font_01_sfnt_off00007f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F83 18740 bytes
SHA-256: 52016c63ee0cd8fd8855830f6c2d9c8ac83d5d7faec0726816e5f8d474f3b9d5

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