Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad4dac16e65f235…

MALICIOUS

PDF

46.0 KB Created: 2021-05-13 20:22:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 478a8d4eee58e44152c801b38e92701a SHA-1: 0d77092d6ac009461aa7f0ea4a9e18bd196ad0b4 SHA-256: 3ad4dac16e65f23546109de77a0004a909a1835b10539de38718bd45bc5fc610
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on them, ostensibly for game hacks or free currency. The primary link redirects to a known malicious site, and the document body itself contains a call-to-action phrase. The PDF structure and embedded links strongly suggest a phishing or scam attempt, likely intended to lead users to a malicious download or exploit site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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 https://netcdn.xyz/app/431946152/get-robux-today-game-hack In PDF document text
    • http://huananhai.net/images/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://huananhai.net/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/coin-master-free-100-spin-link_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://huananhai.net/images/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4978 25092 bytes
SHA-256: 5675207b4ae597772ba88e6d41a3a5fa28c088f8794b778645a3f72446aa82e6
font_01_sfnt_off00008384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8384 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off0000902c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x902C 18536 bytes
SHA-256: 52f9c859b3f332441204d5c114ca3069b0f0b255dc0376a71d348f06f556bd46