Malicious PDF — malware analysis report

Static analysis result for SHA-256 48c194104ef37b9a…

MALICIOUS

PDF

42.4 KB Created: 2021-05-13 08:45:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4ea770e2ec214d9f1b4e870c3f0de805 SHA-1: aa5a25cfeef887dacd51fd47974b6b29a42b70b7 SHA-256: 48c194104ef37b9aad5b850cb8f0aee83f69475e4b4fc38162cfd4694472860d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to entice users. It contains multiple links to redirector infrastructure, including the known malicious domain netcdn.xyz, which likely serves as a gateway to further malicious content or downloads. The ML classifier also strongly indicated maliciousness.

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-free-spin-app-reviews-game-hack In PDF document text
    • https://www.stedwardscheddleton.co.uk/admin/ckfinder/userfiles/files/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.stedwardscheddleton.co.uk/admin/ckfinder/userfiles/files/coin-master-gift-hack_GM406889139.pdfIn PDF document text
    • https://www.stedwardscheddleton.co.uk/admin/ckfinder/userfiles/files/robux-match_GM431946152.pdfIn PDF document text
    • https://www.stedwardscheddleton.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://www.stedwardscheddleton.co.uk/admin/ckfinder/userfiles/files/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://www.stedwardscheddleton.co.uk/admin/ckfinder/userfiles/files/real-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.stedwardscheddleton.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.stedwardscheddleton.co.uk/admin/ckfinder/userfiles/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.stedwardscheddleton.co.uk/admin/ckfinder/userfiles/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://www.stedwardscheddleton.co.uk/admin/ckfinder/userfiles/files/coin-master-today_GM406889139.pdfIn PDF document text
    • https://www.stedwardscheddleton.co.uk/admin/ckfinder/userfiles/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://www.stedwardscheddleton.co.uk/admin/ckfinder/userfiles/files/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.stedwardscheddleton.co.uk/admin/ckfinder/userfiles/files/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • https://www.stedwardscheddleton.co.uk/admin/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://www.stedwardscheddleton.co.uk/admin/ckfinder/userfiles/files/are-robux-generators-safe_GM431946152.pdfIn PDF document text
    • https://www.stedwardscheddleton.co.uk/admin/ckfinder/userfiles/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.stedwardscheddleton.co.uk/admin/ckfinder/userfiles/files/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://www.stedwardscheddleton.co.uk/admin/ckfinder/userfiles/files/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.stedwardscheddleton.co.uk/admin/ckfinder/userfiles/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.stedwardscheddleton.co.uk/admin/ckfinder/userfiles/files/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AEA 24992 bytes
SHA-256: 8a712fc1ed7a1873499c205fbe382acc608d51e9f222f5b08dc9aa4939dae762
font_01_sfnt_off000083ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83CE 18164 bytes
SHA-256: 3d13252e3f7f71aa6624bcb18e9aae7a5401cf83689b12830c1847d43f999553

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