Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fbf7bcd76f12f80…

MALICIOUS

PDF

35.1 KB Created: 2021-06-19 12:36:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8b2aa30c14689cf43c77df03a6d2cfea SHA-1: c1c4d8ab8ba81f215f05f0b3e836f51dc0ab1737 SHA-256: 6fbf7bcd76f12f80f96a09fad55298d35b8fc1949bf29a2ed94f2dca39c62219
142 Risk Score

Malware Insights

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

This PDF file contains numerous links disguised as game hacks and generators, such as 'roblox-jailbreak-hack-2021-september-game-hack'. The presence of a PDF link farm and ML classification strongly indicates malicious intent. The document body, though partially corrupted, contains similar lure text and URLs, suggesting the primary goal is to redirect users to potentially malicious websites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/roblox-jailbreak-hack-2021-september-game-hack PDF link annotation
    • http://library.asih-husada.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/rbx-free_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-name-change-roblox-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-free-coins-on-tiktok_GM835599320.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-speed-hack-roblox-with-artmoney_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/who-to-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-hack-anybody-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coinmaster-links_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/gainbux-gain-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/can-you-get-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/robuxy-com-free-robux_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_off000031a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A3 21916 bytes
SHA-256: b8fed2b72ccec62b48ab65c8e6b263bef858cb60c33bfde2a3065b40e6f40480
font_01_sfnt_off0000619c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x619C 19884 bytes
SHA-256: afe4c16afa2519586f31b8a6b5e3fb59e3eee8c7938dfaddff7855135319b4a0

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