Malicious PDF — malware analysis report

Static analysis result for SHA-256 357b8b1e7352b3a0…

MALICIOUS

PDF

35.5 KB Created: 2021-07-07 04:18:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: f4592ed1a4531ddb68b593a08cdfbd0f SHA-1: 303f2bcf2cb55c28c84c9b7eb98b8833640ba7e2 SHA-256: 357b8b1e7352b3a05ac2311ed9c5ff65e545a2ec63da0d218cb76835d686167f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector, pointing to sites offering game hacks and generators. The primary lure URL is http://netcdn.tw/app/479516143/minecraft-bedrock-edition-download-pc-free-game-hack, which is designed to trick users into downloading potentially malicious content. The presence of numerous similar links on zagi.hr further supports the malicious intent.

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.tw/app/479516143/minecraft-bedrock-edition-download-pc-free-game-hack In PDF document text
    • https://www.zagi.hr/files/coin-master-hack-mod-game-download_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/roblox-scam_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://www.zagi.hr/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/roblox-free-gamepasses_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://zagi.hr/files/customize-v4-roblox-hack_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/download-games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/free-robux-working_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/free-roblox-followers-generator_GM431946152.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
font_00_sfnt_off0000347f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x347F 22320 bytes
SHA-256: 6049d7e39ab6007a06b95a933c2828d4cfb823b569af9fc72608feb347d3e647
font_01_sfnt_off000065f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F2 19120 bytes
SHA-256: f0fe155c1e53163b1cade4296e0b54f6b6a61c47b1408d2b62092597c44fe41f

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