Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe6ad2e8e40eb86…

MALICIOUS

PDF

46.3 KB Created: 2021-06-03 05:33:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1ccf276fc2e0fe3eacbcf8b13e83d93a SHA-1: 4ebe8e74c273b005d272ee0a3e8c31de83736605 SHA-256: fbe6ad2e8e40eb86bbc38fd73b31df2c0fe824804d49f9b364f0a07d3f755cc6
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1071.001 Web Protocols

This PDF document is designed as a lure, impersonating Microsoft to trick users into clicking links that lead to game hack generators and potentially malicious content. The embedded links, such as 'https://netcdn.online/app/431946152/how-to-get-free-robux-codes-game-hack', are part of a link farm intended to drive traffic to these scam sites. The document's structure and content strongly suggest a credential phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/431946152/how-to-get-free-robux-codes-game-hack.
  • 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.online/app/431946152/how-to-get-free-robux-codes-game-hack In PDF document text
    • http://slim.sisminkada.net/repository/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/clean-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-official-fan-page_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-gameplay_GM406889139.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_004_off00004f7a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F7A 24460 bytes
SHA-256: 7c13d47640289f90fc0ef1c21a14d7ae739a84a7c9d530bd4952398c393a7cd7
font_01_sfnt_off000087cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87CB 2820 bytes
SHA-256: 34dd21cbcbbf8680f9624d5ddfa25e49232e6768200f74ddacb5347fd7a5f6dc
font_02_sfnt_off0000916c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x916C 18456 bytes
SHA-256: 647704a1f8ac96c456e26df3796ee2ada4959e42324ca69004a5f2968b1e2bf7

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