Malicious PDF — malware analysis report

Static analysis result for SHA-256 09cacb6cf1396d07…

MALICIOUS

PDF

35.1 KB Created: 2021-07-01 05:57:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ae9f7cd1c2229dc213e11bb17211e0ee SHA-1: e88cb5a1da0cc0354b78fd2f71208ed0304d386e SHA-256: 09cacb6cf1396d07ba9a4c1eb353d666e3d3a8c85e588f8432e804ade6a0dfc5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free game items and directs users to a known malicious redirector URL. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the lure and the redirector suggests a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/406889139/how-to-get-100-free-spins-on-coin-master-game-hack In PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/robux-games_GM431946152.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/roblox-printables-free_GM431946152.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/como-hackear-el-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/how-to-hack-roblox-acounts-to-do-good-stuff_GM431946152.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/how-to-get-minecraft-java-free_GM479516143.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_off000032d3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32D3 22700 bytes
SHA-256: 2151eedad424f40f0570a9e52a533167e57ca6dfe55342f32404a4323c1e4bd2
font_01_sfnt_off0000655a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x655A 18616 bytes
SHA-256: 75e6ca0d846814030aeb8d238a6779e7a1e1c8622c374b69a8320c66161e23d2

Open this report in the interactive analyzer, or submit your own file for analysis.