Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba0b0149429278b9…

MALICIOUS

PDF

40.8 KB Created: 2021-04-26 22:56:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 52638ee77f105462f00cb84b3765ac76 SHA-1: 19402856f06ffe445acb2ef7b4bd116090e4a885 SHA-256: ba0b0149429278b9a812ff050693b32dbc937a545ecfcee44fad3c9fa715a56a
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting a "free generator / game hack" for Roblox. The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links confirms a malicious workflow. While no scripts were directly extracted, the PDF's structure and embedded links are designed to trick users into navigating to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.xyz/app/431946152/free-alts-roblox-game-hack In PDF document text
    • https://lib-stie.yai.ac.id/repository/comment-acheter-des-robux-avec-une-carte-hacker.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/ccv5-roblox-dbfp-hack-tuto-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/constructeur-roblox-free.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/robux-hack-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-4ll-cool-hack.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-robux-hack-tool-no-survey.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-trolling-with-hacks.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-how-to-get-a-free-dominus-hat-2021-australia.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/best-free-script-injector-for-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-clothes-in-roblox-2021.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_003_off000041dc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x41DC 26656 bytes
SHA-256: a51018d26a8c6d7c7ef30be911578ee85a65e3c70f3c0117a2a092283b32840d
font_01_sfnt_off00007e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E80 18052 bytes
SHA-256: d83d32f0b9f03725d490ca126155751f85ac74bca8bf8b97b6988e62eb78f670

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