Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d3b3d6bfa3b67bc…

MALICIOUS

PDF

42.9 KB Created: 2021-05-13 13:08:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 565102d26fde2a7127ae60c2928b0bdd SHA-1: 48b5237ab098c889bf1b23f280f046ad6091a5e3 SHA-256: 4d3b3d6bfa3b67bcb46d2f3c91216c2a607def2d3403a0f82e6e0e3e20ad17f2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to a malicious domain, masquerading as 'game hacks' and 'free generators'. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to lure users into downloading potentially harmful content. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/hacking-apps-for-roblox-game-hack In PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/best-hacked-client_GM479516143.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/hack-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/robuxhub-net_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/coin-master-free-card-link-today_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
font_00_sfnt_off000049c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49C9 24196 bytes
SHA-256: caf4c838862f79a20f8b99eae15b2d1b5a475516eaaae628fd321a3467d292f9
font_01_sfnt_off00008045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8045 20000 bytes
SHA-256: 369b650653f54d6f405f8f6900e7ffd4d20927cda282965fb7c21a00aa62f3aa

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