Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d22970af4fa4a39…

MALICIOUS

PDF

47.3 KB Created: 2021-06-03 14:53:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: f442e2b8f74147954e577ebbb31f1023 SHA-1: 45da23dca653b36ff2952db1a88403cbab6eca6d SHA-256: 1d22970af4fa4a39f763efc27cf1fb96b5ebfc2af5a472aa84718564f829f33d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, including one specifically advertising a 'free generator / game hack'. The document body, though heavily obfuscated, contains references to game hacks and URLs that reinforce this lure. The primary malicious action observed is the redirection to potentially harmful content, likely a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/479516143/minecraft-story-mode-free-game-hack In PDF document text
    • https://www.jcn.co.uk/uploads/files/files/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-promo-codes-2021-robux_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/op-rewards-robux_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000542b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x542B 25108 bytes
SHA-256: 5ff07dbd6a5cbb79bff1ff0aa78459e87b28d423044974d7cb7fb410e8c10e8c
font_01_sfnt_off00008c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C67 3128 bytes
SHA-256: 801f6fa60decd1add2f223f91580103c35e150c924465f86a7a572b3e00674f9
font_02_sfnt_off000096a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96A7 18064 bytes
SHA-256: 5e5fb910f64b2149404149cb3256d61ed755ed43a7017f23b86fa73a2f1502c2

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