Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac2875b9a31dc5f…

MALICIOUS

PDF

45.5 KB Created: 2021-05-17 14:35:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 74fef8d85aa0249da92bb33ffc8c74d6 SHA-1: 2603b5f0eabaaa3ca2d935d059f0db450f2769fa SHA-256: 6ac2875b9a31dc5f99bd669303e263ff4dbf6aceadc3ecc9d4353d97da693576
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and websites promising free in-game currency, such as 'free Robux'. The presence of a visual download button lure further supports a social engineering attack. The document's primary function appears to be directing users to malicious infrastructure, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/free-robux-reddit-game-hack In PDF document text
    • http://www.dciprotection.ca/images/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.dciprotection.ca/images/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.dciprotection.ca/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://www.dciprotection.ca/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://www.dciprotection.ca/images/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://www.dciprotection.ca/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://www.dciprotection.ca/images/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • http://www.dciprotection.ca/images/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://www.dciprotection.ca/images/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://www.dciprotection.ca/images/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://www.dciprotection.ca/images/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdfIn PDF document text
    • http://www.dciprotection.ca/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.dciprotection.ca/images/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • http://www.dciprotection.ca/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47DE 27548 bytes
SHA-256: 565b5a6819350d8eea38c0eb8ae480ac5737879506c3a7a685abbee14104d689
font_01_sfnt_off000084b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B7 2884 bytes
SHA-256: 8a43bb6e8df1af2fb45a879a4690d24d7c589850e720fa894cc2da68b771c6ef
font_02_sfnt_off00008eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EAE 18412 bytes
SHA-256: c557a72efce44f866a9d9d033701dfd5e052f904d36d096978818f2976e16735

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