Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce05beb3bf0e21cb…

MALICIOUS

PDF

41.2 KB Created: 2021-05-12 01:08:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e09d83a947b7ab94eb61797c4d38407e SHA-1: 47f6b8a4c10dd6b110fefa90a5874f077cc5ff0e SHA-256: ce05beb3bf0e21cbbb0b6fa888528c313d01cb3e629b4a4f7599608a42fa0e26
220 Risk Score

Malware Insights

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

This PDF file contains numerous links, many of which point to external PDF files hosted on a link farm. The primary link directs to a 'game hack' generator, suggesting a lure for users seeking cheats or exploits. The extensive use of external links and the nature of the content indicate a likely SEO manipulation or redirection scheme to potentially host malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • 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.
  • 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/406889139/coin-master-links-for-free-spins-2021-game-hack In PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-mster-free_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/gameoffice-net-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-without-human-verification-india_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-400-spin-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-spin-coin-master-2021_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
stream_003_off0000477d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x477D 23892 bytes
SHA-256: 117e67f84874ee2e196966d39e39ba89f63fd98ba5d969f677d56eb3232efdcc
font_01_sfnt_off00007dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEC 18456 bytes
SHA-256: a92e7a86c8f96ab5d5d3ed0cab2d9be7dec7c1a4821e4e0502d142dbf0f5217f

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