Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd4fbc09780de63…

MALICIOUS

PDF

46.9 KB Created: 2021-05-13 23:04:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 24090ea0c1f6bf156c2b584a614bf0ba SHA-1: c89ad0aedf13995d3a5444a68532620f3f74c5e5 SHA-256: bbd4fbc09780de6312a49eee46666e613eea55c3e7e5db9c209821c3a21cae94
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game hack lures, suggesting a phishing or scam attempt. The document body and embedded URLs are consistent with a lure to download or access potentially unwanted or malicious content. While no scripts were explicitly extracted, the nature of the links and the ML classifier output indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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 https://netcdn.xyz/app/431946152/roblox-phantom-forces-hack-game-hack In PDF document text
    • https://encounternepal.com/userfiles/files/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-points_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/wurst_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coun-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-roblox-card_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/game-toolbox_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-daily-free-spins-link-today-2021-free_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048a8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A8 26100 bytes
SHA-256: 65e87aab4d183a46f460c6917ae478d4b97c24baa10e2c21a409e2ba5dff6edc
font_01_sfnt_off000085d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D1 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000092e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92E3 19028 bytes
SHA-256: a1c2896b7dc960917d06e8f54c838956c7eaad0f88986fe011a2bb83a0b16557

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