Malicious PDF — malware analysis report

Static analysis result for SHA-256 1536d6ccd9343ed9…

MALICIOUS

PDF

44.3 KB Created: 2021-05-11 17:30:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 91961ec43528b9e2c76b05657c8d688a SHA-1: 77671d893b92917c232a0df821683e521f492a42 SHA-256: 1536d6ccd9343ed9a362570b0ee65699c804dd9c5ab072929c650b148c2c7d10
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The primary malicious URL identified is https://netcdn.xyz/app/431946152/google-roblox-games-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it is designed to lead the user to potentially harmful external content, likely for further exploitation or phishing. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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 https://netcdn.xyz/app/431946152/google-roblox-games-game-hack In PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/how-do-you-earn-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/win-free-robux_GM431946152.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/roblox-lawsuit_GM431946152.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/try-coin-master-hack_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_003_off00004ac4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AC4 28544 bytes
SHA-256: 5637fd0d901c11fdaf671c6a794e79b62b2db1a04fff845e225f18e3c6e8f692
font_01_sfnt_off00008a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A0F 18560 bytes
SHA-256: 0fb1d19a9ce31739a953e5696a177f7c2cbb3bd8fcc5147d812294bb20adc511

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