Malicious PDF — malware analysis report

Static analysis result for SHA-256 579b3d512d31e65a…

MALICIOUS

PDF

33.6 KB Created: 2021-06-25 11:42:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9febec56a782145a4c7b3899548daa05 SHA-1: 091268584b4dd22a3dc9ccdb13182b50aa8612d6 SHA-256: 579b3d512d31e65a8e82620d33a9e37ea5a2947313631a9797a201aeb4c8b786
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for free game items and hacks, specifically targeting Roblox and Coin Master players. It contains numerous links to redirectors and SEO link farms, including the primary malicious URL http://netcdn.co/app/431946152/create-a-free-roblox-account-game-hack. The document's structure and embedded links strongly suggest it is designed to lead users to potentially malicious websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/create-a-free-roblox-account-game-hack In PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-at-http-rxnow-eu5-net_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-free-body-roblox-girl_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/real-free-robux-hack-to-buy-anything_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-roblox-gift-codes_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/can-i-get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-how-to-hack-the-hitbox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-no-rewards_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-strategy_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/can-you-trust-rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-hack-spin-generator_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_off00002ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA4 21776 bytes
SHA-256: 4c469da5a3c07b70651b629622deef36a003989ba89a47ca7795ec060358eca1
font_01_sfnt_off00005ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC7 18896 bytes
SHA-256: 15d4ffffaca3192a3056eda53348b2f0a7dfda9cfb7d111bd062d411146316d9

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