Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e5346a08c129382…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 23:13:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b7cc11f4fe166c9f81973d7b1babe86b SHA-1: 9c0ef653168971cef66c7846613eca992b6fe934 SHA-256: 5e5346a08c1293821ded7e9dc0d0117a35b18f5d43bda6b13da95908c13fc9f8
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one pointing to a known malicious redirector infrastructure, and another using a raw IP address. These links are presented as lures for game-related cheats and currency, indicating a phishing attempt. The document body, though partially garbled, contains references to these lures and embedded URLs, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.tw/app/406889139/coin-master-free-spins-facebook-game-hack In PDF document text
    • http://118.98.227.172/opac/repository/free-cosmetic-items-roblox-2021_GM431946152.pdfPDF link annotation
    • http://118.98.227.172/opac/repository/free-stuff-roblox-lobby_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/hack-roblox-cheat-engine-63_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/comandos-de-hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/download-portable-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-robux-today-2021_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-not-crash-when-you-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-hack-roblox-robux-no-download-windows-10_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-roblox-servers_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-free-gamepass-script-v3rmillion_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-tycoon-cheats_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/sites-that-actually-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/cheat-glitchtale-roblox_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/robux-hack-human-verification_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-spin-coin-master-instagram_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_002_off000032b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32B7 22656 bytes
SHA-256: dfb386c1df71de90ea544f38b38acec38f818e8e2948104bbf947548545549f0
font_01_sfnt_off00006517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6517 18504 bytes
SHA-256: 60d2bdc76bcd03856ff56843c76a1045165bedbcd3c7078909a454fabf5c0968

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