Malicious PDF — malware analysis report

Static analysis result for SHA-256 51bde6217dd88edb…

MALICIOUS

PDF

35.0 KB Created: 2021-06-26 15:46:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d4d25c10f745b0f7306f2ade2014f3c8 SHA-1: 9ed20102f7f90a2d07d890c72f2c35cb4a5a3239 SHA-256: 51bde6217dd88edb7ba80637329e60661db7e55699559698a8c529288b86b999
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful content.

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-roblox-promocode-november-2021-game-hack In PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/hack-roblox-with-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-hack-level-7-download_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-printables-free_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-robux-nicsterv-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/boy-clothes-free-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/robux-in-1min-hacken-german_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-credit-card-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-codes-pc_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roblox-toy-code-march-3rd-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/pubg-uc-qiwi_GM1330123889.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-animation-roblox-june_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FBF 22424 bytes
SHA-256: d9a5c44181e24ddf4e6a63625849799592eb9d3d978f0bd2dc7843b435b27453
font_01_sfnt_off000061d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D0 19752 bytes
SHA-256: 790b2a69f44564b68894aa4bb1cae005d9e69276449a6375ae6fc732270ee886

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