Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d717d21cf74a8f…

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 09:40:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 001fe109db536d2b8a07af20ec563441 SHA-1: 0f010d4209bdff389244089e81ebf78590aef19a SHA-256: d0d717d21cf74a8f5044c048a9820446329f1b63c030b13d1e1946067e728c78
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, masquerading as 'free generator / game hack' lures. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The primary malicious activity observed is the redirection to potentially harmful websites, likely to deliver further malware or conduct phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-legit-game-hack In PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/pokemon-go-free-85_GM1094591345.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/all-minecraft-handbooks_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/www-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/login-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-heaven-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-version-download-2021-ios_GM406889139.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_004_off00004d89.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D89 26272 bytes
SHA-256: d67b274be989b296a27defc3e391b21b131f688a22289c8339a77eb6c358bd3d
font_01_sfnt_off00008a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A2D 18528 bytes
SHA-256: aa02e962ea97e6ca8489eff7fd27dc9c81bb0b76c5ed523337a23ffa677521ed

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