Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7f613031dad6dc1…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 12:48:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 584cce5c0df9a290249781cd8d95de90 SHA-1: 5461af0a1aae5e3f43d9b6212d9202ed766caf46 SHA-256: c7f613031dad6dc1b1e1375d8fc943313379cc59f62905bf330c9de6b657d38c
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The primary redirector URL is http://netcdn.tw/app/431946152/hacked-roblox-accounts-list-game-hack, which is designed to lead users to potentially harmful content. The ML classifier also flagged this PDF as malicious with high confidence.

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/431946152/hacked-roblox-accounts-list-game-hack In PDF document text
    • https://www.tdbaska.hr/files/114-hacks_GM479516143.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • https://www.tdbaska.hr/files/free-me-robux_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • https://www.tdbaska.hr/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/robux-best_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • https://www.tdbaska.hr/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/how-to-get-free-robux-on-ipad-2021_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/generator-robux-free-2021_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • https://www.tdbaska.hr/files/how-to-get-free-vip-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/hacks-for-rogoul-roblox-pllz-teach-me_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_off000031a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A9 22236 bytes
SHA-256: 5d780d4a942806d1a82f59eef2ee473d3e2dfbbb7bc2540c43798596cd4116c9
font_01_sfnt_off00006330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6330 19196 bytes
SHA-256: 381610bbab0b7b31e380a7a4918c50b3e30c1fbe9436aeae15edec1864da4a24

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