Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37a407445242464…

MALICIOUS

PDF

37.3 KB Created: 2021-06-20 13:02:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e9f7b097fd880445b95c991307ce7227 SHA-1: e26fd81e40ea5f95ebff317b4a03084750fdc7dd SHA-256: b37a407445242464bd8f5987b3a898eaf6d5043377dc42fa31772526dc06996b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure and websites that promise game hacks and free currency, aligning with common social engineering lures. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of numerous suspicious URLs strongly indicate a malicious intent to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a phishing or malware distribution attempt.

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 http://netcdn.co/app/431946152/how-to-get-free-robux-admin-code-game-hack In PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-hack-dead-winter-roblox-mac-download_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-free-money-in-adopt-me-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/cheats-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-ge5-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/toolbox-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/my-account-has-been-hacked-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-www-com_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/april-1-2021-roblox-hacking_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/pokemon-go-free-incubators_GM1094591345.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-promo-code-to-get-free-robux_GM431946152.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
font_00_sfnt_off000037a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37A5 23220 bytes
SHA-256: 732023f24296d7afa815c581eee493f72b60c621cddf946f31bbaf05571b285a
font_01_sfnt_off00006b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B56 19536 bytes
SHA-256: 0dc9052211604cbe6c618a175acdc1e8648ff4ca1dfcd094358894f0ef06e44b

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