Malicious PDF — malware analysis report

Static analysis result for SHA-256 531c6826aa2bf784…

MALICIOUS

PDF

35.2 KB Created: 2021-07-01 17:20:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9662daab1502311063f81f598e3be0c5 SHA-1: e17affdc77af5f925f1b7f16b76f2272fda3ab50 SHA-256: 531c6826aa2bf7849988d87e2f381ce95a462fa193150648b7cde0822b27b700
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links disguised as game hacks and generators, directing users to malicious websites. The document body and heuristics indicate a lure for potentially unwanted software or further malicious downloads. The use of embedded URLs and a known malicious redirector infrastructure points to a phishing or scam campaign.

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.co/app/431946152/roblox-how-to-enter-cheat-codes-game-hack In PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-escape-school-online-free_GM431946152.pdfPDF link annotation
    • http://111.68.26.74/widyapustaka/repository/how-to-hack-robux-using-inspect_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/blox-fun-info_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-money-on-roblox-ultimate-drivin_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-cheat-engine-hacks-admin_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-cheat-generator_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/new-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/synapse-roblox-hack-download-free_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-play-roblox-games-for-free_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-roblox-account-generatorold-account_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/greenwood-roblox-como-consegir-free-vip_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-can-i-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-cheat-engine-god-mode-script_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-game_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-generator_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-websites-that-actually-work-2021_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_off00003183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3183 22672 bytes
SHA-256: 67ab46974f49e8e3b9172790917192a340cdc736cfba001d81c059799d60e8aa
font_01_sfnt_off00006439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6439 19092 bytes
SHA-256: b319082156dda8851b840efe4aa6ac78ecc6c77a16dc4759e2928a9d4efd08bd

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