Malicious PDF — malware analysis report

Static analysis result for SHA-256 1573c15688dcfe81…

MALICIOUS

PDF

46.4 KB Created: 2021-05-12 12:36:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 0ec5bfa2d7ac76ec5e388a26659eef96 SHA-1: e543643885f7c4f572f20b340a0f6c1fb396afc7 SHA-256: 1573c15688dcfe81e246e757157d39c27a69601c71318130824d5b1c1da8af20
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as offers for game hacks and free items. The primary lure is for 'free Roblox clothes templates' and similar game-related cheats. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

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/free-roblox-clothes-templates-game-hack In PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/android-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/mc-hacks_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-roebucks_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-install-free_GM431946152.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_off00004884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4884 26292 bytes
SHA-256: f289f11dd6be4d0e1ae278ce1a0d1c9df3f342a7bbbf95a96c121ba3fad99bd3
font_01_sfnt_off00008450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8450 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off000090f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90F8 18884 bytes
SHA-256: 640c63db932491e4e87d0cbe8bcafce8540653682ab1762ebca962469be3fa30

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