Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeaf978f9315fb79…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 12:52:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0d4efc0bff67518b51d1d6eee514397c SHA-1: 6ee3056e35617df074c7a9192c41ed56c1c12605 SHA-256: eeaf978f9315fb791f958d8fb882523dcaa3c7d3a0f472add3afc75d76da5889
200 Risk Score

Malware Insights

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

This PDF document contains multiple links designed to redirect users to malicious websites, masquerading as 'free generators' or 'game hacks'. The document impersonates the UPS brand, attempting to trick users into clicking a link hosted on `netcdn.online`, which does not match the impersonated brand. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to lead users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/but-link-says-free-robux-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.online/app/431946152/but-link-says-free-robux-game-hack In PDF document text
    • http://lib.stie-aub.ac.id/repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/mcpe-free-download_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-free-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/master-coins-free_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hack-tool-no-survey_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
stream_004_off0000506d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x506D 25556 bytes
SHA-256: 264143c4b0b2c6f549a0de23b5f3466d7a1c36ce057d06dba483057d9a05c8ad
font_01_sfnt_off00008bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BEA 18816 bytes
SHA-256: 8fbe90bccae9ee3155d3d967e7829d2e05c9e53767c9dd01fe36dc6e4248615b

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