Malicious PDF — malware analysis report

Static analysis result for SHA-256 488b1edc38f37574…

MALICIOUS

PDF

34.0 KB Created: 2021-07-10 00:03:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 49c189b00119497ca7928045e0916d44 SHA-1: 6b46aa521cf0e5ec7b8f663315d335e6b23cf400 SHA-256: 488b1edc38f3757460812d4eb8d0d44b5e62f777692e1f14a83277c3d6416941
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links disguised as 'game hacks' and 'free generators', with a primary redirector at http://netcdn.tw/app/479516143/play-minecraft-for-free-on-pc-game-hack. This pattern suggests a phishing or malware distribution lure, likely intended to exploit user interest in free in-game items or cheats. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.tw/app/479516143/play-minecraft-for-free-on-pc-game-hack In PDF document text
    • https://vierabyragazze.com/upload/files/can-roblox-detect-hacks_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/get-free-gear-in-roblox_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/robux-hacks-code-admin-commands_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-roblox-grouup-bots_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/unpatchable-free-robux-made-by-robuxian-for-roblox_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-hacks-download-2021-with-virus-total_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/como-conseguir-roblox-badges-hack_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-roblox-generator-club_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-hack-robux-using-inspect-element_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-high-school-life-free-steff_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-roblox-pin-t-shirt_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
font_00_sfnt_off00002fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAB 22564 bytes
SHA-256: 0b0d1d39ef6d54a0aaa11bff0bd9e01b5976bb8a8393a00fbc891c81aee6adbd
font_01_sfnt_off000061f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F8 18408 bytes
SHA-256: 21b2137426b476267ea7c0394b250426d475a18dc6e7bf5e59e9a16705a70499

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