Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5ea7882e022c710…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 09:53:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 8444c1991469355ee8f2403796baffae SHA-1: 6ad59245ca49596edef87d3cd08c3b6331c9144e SHA-256: d5ea7882e022c7106257ca7f9c557a1aada565beb49d30571540f8e1656bc163
160 Risk Score

Malware Insights

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

The PDF document contains multiple links and a call-to-action lure related to game hacks and free currency, directing users to a known malicious redirector. The primary malicious URL identified is http://netcdn.tw/app/431946152/how-to-hack-roblox-accounts-for-robux-game-hack. This suggests the document is designed to lead users to potentially malicious websites, likely for further exploitation or phishing.

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/how-to-hack-roblox-accounts-for-robux-game-hack In PDF document text
    • https://www.itc-nekretnine.hr/files/dailyrobux_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/wurst-download_GM479516143.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/roblox-cheats-for-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/working-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/roblox-hack-robux-and-tix-download-no-survey_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/hack-para-ro-ghoul-roblox-2021-rc_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/good-reasons-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/top3k-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-robux-pastebin-robuxian-easy_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-spins-coin-master-links-app_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-executor-roblox_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/how-to-get-free-robux-without-human-verification-2021_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_off00002fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDB 22320 bytes
SHA-256: 752a09a51e2d83967961fae15e43d17d2c4a9eadfb650ab04c19d56d7230d354
font_01_sfnt_off000061a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A6 19228 bytes
SHA-256: c30d944de0a6baf9276c4865844fcb990da37fa04730b451441052e57c665125

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