Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ba54aeb7743877e…

MALICIOUS

PDF

44.1 KB Created: 2021-05-15 16:35:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 23689edc989c09b405cc3e1daf72fa80 SHA-1: dd4b3779988d6aa5be71b3c0067dccbb9b63ba4f SHA-256: 4ba54aeb7743877eebd13b5964bca41de202407a7123f1c821b0b729fda676cf
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that impersonate brands like Facebook and promise game-related benefits, such as free Robux or Coin Master spins. These links redirect to malicious infrastructure, specifically `https://netcdn.xyz/app/431946152/roblox-free-online-game-game-hack`, which is identified as a malicious redirector. The document's content and heuristics strongly suggest a credential phishing or scam campaign designed to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/roblox-free-online-game-game-hack.
  • 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/roblox-free-online-game-game-hack In PDF document text
    • https://www.laksanatravel.com/ckfinder/userfiles/files/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.laksanatravel.com/ckfinder/userfiles/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.laksanatravel.com/ckfinder/userfiles/files/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
    • https://www.laksanatravel.com/ckfinder/userfiles/files/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • https://www.laksanatravel.com/ckfinder/userfiles/files/whats-robux_GM431946152.pdfIn PDF document text
    • https://www.laksanatravel.com/ckfinder/userfiles/files/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.laksanatravel.com/ckfinder/userfiles/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.laksanatravel.com/ckfinder/userfiles/files/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • https://www.laksanatravel.com/ckfinder/userfiles/files/free-robux-reddit_GM431946152.pdfIn PDF document text
    • https://www.laksanatravel.com/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.laksanatravel.com/ckfinder/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.laksanatravel.com/ckfinder/userfiles/files/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • https://www.laksanatravel.com/ckfinder/userfiles/files/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • https://www.laksanatravel.com/ckfinder/userfiles/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://www.laksanatravel.com/ckfinder/userfiles/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://www.laksanatravel.com/ckfinder/userfiles/files/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.laksanatravel.com/ckfinder/userfiles/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.laksanatravel.com/ckfinder/userfiles/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://www.laksanatravel.com/ckfinder/userfiles/files/weird-roblox_GM431946152.pdfIn PDF document text
    • https://www.laksanatravel.com/ckfinder/userfiles/files/coin-master-hack-mod-apk-free-download_GM406889139.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_off00004b04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B04 26804 bytes
SHA-256: 553d181f1e992b8da2ea14703dd321a73b53489a51159accb53a946d7d50ba37
font_01_sfnt_off00008997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8997 18556 bytes
SHA-256: df154610b6efbd4d042b7dd8e86d5cfe30e06380d3f41432299740dca1959b28

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