Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ec3cc9f7722597…

MALICIOUS

PDF

42.3 KB Created: 2021-05-16 15:10:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 98c74ef377b10e28234fa01bcdc33147 SHA-1: ad1ae25d7808daa7d593adbff2221d9392b02037 SHA-256: e5ec3cc9f7722597befea5359914a1bac0af692ef88223e698b624cf5b45a8fc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that are flagged as malicious redirectors, specifically promoting game hacks and cheats. The document body, though partially corrupted, contains references to 'Coin Master Ultra Attack Hack' and directs users to URLs like 'https://netcdn.xyz/app/406889139/coin-master-ultra-attack-hack-game-hack'. This pattern suggests a lure to download potentially unwanted or malicious software, or to engage in phishing activities. No scripts were extracted from this sample, but the embedded URLs and heuristic firings strongly indicate a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-ultra-attack-hack-game-hack In PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/e-free-roblox_GM431946152.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/coin-master-free-spin-link-today-50_GM406889139.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/free-spin-link-for-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/give-free-robux_GM431946152.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/google-play-coin-master-free-spins_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_off00004b55.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B55 25208 bytes
SHA-256: ec0902e8c346b615bbee754fc7514cf6d4761ce64435be849ad1399ac5f9e00b
font_01_sfnt_off00008402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8402 17976 bytes
SHA-256: 1801f115f2963c0be987287eb476f8c8d71e26b2eb4f67ac20109eb32362552c