Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad7ebefe3a176023…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 12:51:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8830e3616e202d95a5f474fcdf8d28d2 SHA-1: 32e4ae562b59ced284103211593c04259533dbdf SHA-256: ad7ebefe3a176023d022a8fbc5bfa2d512e4ccc17cba8e36d6326650e4e1ce22
220 Risk Score

Malware Insights

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

This PDF document contains numerous links designed to lure users into clicking on them by promising game hacks and free in-game currency. The primary link directs to a known malicious redirector infrastructure, suggesting a multi-stage attack. The document's structure and content indicate it's part of a broader campaign to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/are-there-any-coin-master-hacks-that-actually-work-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-robux-page_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/robuxian-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-online-game_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/pokemon-go-free-and-pokeball-plus_GM1094591345.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_002_off00003070.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3070 22892 bytes
SHA-256: aa5a470cdc3d83eaaa5ac99e9767a1d3e86fe7e554f2a620f5a943b78e417ff7
font_01_sfnt_off000063c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C5 18764 bytes
SHA-256: fda0f92cf4b877814e31b565e5e35f3727f0f59612dfc2e3edd29183971e4e11

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