Malicious PDF — malware analysis report

Static analysis result for SHA-256 399d27b490724d60…

MALICIOUS

PDF

53.5 KB Created: 2021-05-12 09:04:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 308559db78cacb0a9425c0467fdde057 SHA-1: b748f6258834c68f8ca3b1c08069e300ed596ee4 SHA-256: 399d27b490724d6086508a197e1431aa9489b378f6eb81f0408cfc8808d93cbf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a direct link to a known malicious redirector infrastructure, disguised as a 'game hack' generator. The document body and embedded URLs reinforce this lure by referencing popular games and 'hack' tools. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it is designed to redirect users to potentially harmful content, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9017

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/get-more-robux-game-hack In PDF document text
    • http://www.dimalcco.com/images/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://www.dimalcco.com/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.dimalcco.com/images/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://www.dimalcco.com/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://www.dimalcco.com/images/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
    • http://www.dimalcco.com/images/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.dimalcco.com/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://www.dimalcco.com/images/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.dimalcco.com/images/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • http://www.dimalcco.com/images/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.dimalcco.com/images/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://www.dimalcco.com/images/abd-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47A6 27928 bytes
SHA-256: 4e4fd4d96608a592140c1ff7a3e64b5b9cc52fe5a1a002741489a235b0cef92c
font_01_sfnt_off0000875b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x875B 8132 bytes
SHA-256: e6d68e720ea5acf9dccbf7ffde18db6f65c62a99ab7725aa43e30329033a7787
font_02_sfnt_off0000a243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA243 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_03_sfnt_off0000aeea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEEA 18152 bytes
SHA-256: 3f0afb5031a6524980f5b4f14d61315d560e84a079a8a334c40e6e2be07f7597