Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a33771cedabb6b5…

MALICIOUS

PDF

36.4 KB Created: 2021-06-29 19:05:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0b2d61867d85e144405acd0d3012f379 SHA-1: cb48c482d5569ce418b2ff4d6d8dbe90649c7322 SHA-256: 2a33771cedabb6b55ea7086beafce08eaf95c4dba9e882be16fbe10f1821a27f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack lure, directing users to a known malicious redirector. The document body, though partially corrupted, contains text related to 'Free Auto Clicker Download Tutorial Roblox Bee Swarm Simulator' and the malicious URL. The presence of embedded URLs and the ML classifier's high confidence further support the malicious nature of this document, likely intended to trick users into downloading malware or visiting further malicious sites.

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/free-auto-clicker-download-tutorial-roblox-bee-swarm-simulator-game-hack In PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/freer-pro-tiktok_GM835599320.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-sound-code-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/como-usar-hacks-en-booga-booga-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/apk-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/hackear-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-rebux-hack_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-make-t-shirts-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-free-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-admin-hack-client_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-boombox-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-bear-mask-for-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-vending-machine_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/robux-hack-site-2021_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-gear-codes-for-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/hack-any-account-in-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/hack-for-roblox-super-power-training-simulator_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_off0000356d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x356D 22140 bytes
SHA-256: 5edaf66fa9808c1b845e415b134f90499d090f08c13de659cfb79bfb1f07f898
font_01_sfnt_off0000669c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x669C 19952 bytes
SHA-256: 8385362428d9fee57ada801ebb35c4c551e59b8bb64c78ea3ebb985fb342c9b6

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