Malicious PDF — malware analysis report

Static analysis result for SHA-256 25f1e18be4d42c1a…

MALICIOUS

PDF

35.6 KB Created: 2021-06-18 09:28:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 8df874625c3c6e05c632db18985657f4 SHA-1: c8ba19deebe103b76a990b41f7fd68fac90e2ffc SHA-256: 25f1e18be4d42c1ab76a248f449a3c4576e5562bedb787228a6e4eea6905d04f
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, using titles related to popular games like Roblox and Coin Master to entice users. It contains numerous links to external sites, including a known malicious redirector at http://netcdn.co/app/431946152/how-to-hack-diamonds-roblox-murder-mystery-2-game-hack, and a large number of links to other PDFs hosted on mtsn-baranti.com, forming a link farm. The presence of a visual download button further supports the malicious workflow. No scripts were extracted, but the document's structure and embedded URLs indicate a phishing or redirection attack.

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.co/app/431946152/how-to-hack-diamonds-roblox-murder-mystery-2-game-hack In PDF document text
    • http://mtsn-baranti.com/perpus/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/hacker-web-robux_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/xbox-one-roblox-lumber-tycoon-2-cheats_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/jailbreak-roblox-safes-hack_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/new-roblox-swordburst-2-hack_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-sexually_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-coin-master-spins-link-download_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/robux-hack-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_off000031f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31F9 21916 bytes
SHA-256: 0f8bb3aa4b06a42aa1abd9a4d1068a49977a77c55b8befeeeb9a3afa5e7cfe3d
font_01_sfnt_off00006240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6240 20288 bytes
SHA-256: 481898a873297b4a165a5ce19f0ba4cc3a9b8c820363126a67ecf5f7ba3ce6db

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