Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff30e091be4d25e9…

MALICIOUS

PDF

45.2 KB Created: 2021-06-03 09:16:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4ff60486065c56ed32fae3ef70b38587 SHA-1: f327ba1619068788bc5da051e079d948870cc669 SHA-256: ff30e091be4d25e939a98538b99b54bfc336aa86433a780a0490fc9042f542a0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'free Robux generators' and game hacks. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves luring users with enticing offers to click malicious links, which is a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.online/app/431946152/free-robux-generator-codes-game-hack In PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/daily-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-website-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-mod-apk-unlimited-spins_GM406889139.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
stream_004_off000051b0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51B0 26268 bytes
SHA-256: 6b448649d51aa8eda44826bf24b524124fb92a5b706a0d81a38ab2d669f003b0
font_01_sfnt_off00008d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D6C 18520 bytes
SHA-256: a3c42500ab941ca6b3cc9f1b186676fd5f7f9f0c0249e27b539405b68f11e4ed

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