Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1ea826b0365ded…

MALICIOUS

PDF

34.5 KB Created: 2021-06-19 14:15:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1090b4020b6aa4081059d51e0475dfe9 SHA-1: c884fbf96c100d60ec32dd2dc8b50fc2b359a998 SHA-256: 0a1ea826b0365ded78aab58dabb9787129e9f2c7400744c15a9401c0cf042591
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links pointing to a known malicious redirector infrastructure, specifically advertising 'free coin master hacks'. The document body and heuristics confirm the intent is to lure users to click these links, likely leading to further malicious content or downloads. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a phishing or redirection attack.

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/free-coin-master-hacks-game-hack In PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-hack-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-accounts-for-sale-free_GM431946152.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/free-hair-roblox_GM431946152.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/real-robux_GM431946152.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/get-free-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/free-tiktok-likes-no-survey_GM835599320.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/can-you-get-free-robux-on-roblox_GM431946152.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_002_off00003253.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3253 22464 bytes
SHA-256: 0797d569a837771567cdde89ebaf587807f3ac0d90ed9825f11ea62057dd01c5
font_01_sfnt_off0000648d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x648D 18168 bytes
SHA-256: 0b2a96827142e2704bc3cf92debab539c74e7a066f59150f0464612b64e0e13f

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