Malicious PDF — malware analysis report

Static analysis result for SHA-256 8221c44693144760…

MALICIOUS

PDF

35.7 KB Created: 2021-06-18 01:50:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 19b30f79fbc5ac375b45adea9c7b12f7 SHA-1: 5a12522237aaedb63db7f959768bf02776b3905b SHA-256: 8221c44693144760b7f19930125512ee97c4ed9ba2fba69d36d6166c217f2e3f
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, promising free Robux or game hacks. The primary link, http://netcdn.co/app/431946152/how-to-bypass-human-verification-on-free-robux-game-hack, is identified as a malicious redirector. The document body and embedded links suggest a social engineering tactic to drive traffic to potentially malicious or scam-related websites.

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-bypass-human-verification-on-free-robux-game-hack In PDF document text
    • https://fud.iain-surakarta.ac.id/pustaka/repository/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • https://fud.iain-surakarta.ac.id/pustaka/repository/can-roblox-know-if-you-hack_GM431946152.pdfIn PDF document text
    • https://fud.iain-surakarta.ac.id/pustaka/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://fud.iain-surakarta.ac.id/pustaka/repository/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • https://fud.iain-surakarta.ac.id/pustaka/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://fud.iain-surakarta.ac.id/pustaka/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://fud.iain-surakarta.ac.id/pustaka/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • https://fud.iain-surakarta.ac.id/pustaka/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://fud.iain-surakarta.ac.id/pustaka/repository/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • https://fud.iain-surakarta.ac.id/pustaka/repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://fud.iain-surakarta.ac.id/pustaka/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://fud.iain-surakarta.ac.id/pustaka/repository/roblox-robux-hack-without-human-verification_GM431946152.pdfIn PDF document text
    • https://fud.iain-surakarta.ac.id/pustaka/repository/how-to-get-traded-pokemon-to-evolve-without-trading_GM1094591345.pdfIn PDF document text
    • https://fud.iain-surakarta.ac.id/pustaka/repository/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • https://fud.iain-surakarta.ac.id/pustaka/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://fud.iain-surakarta.ac.id/pustaka/repository/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://fud.iain-surakarta.ac.id/pustaka/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://fud.iain-surakarta.ac.id/pustaka/repository/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://fud.iain-surakarta.ac.id/pustaka/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://fud.iain-surakarta.ac.id/pustaka/repository/coin-master-free-spins-link-2021_GM406889139.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_off0000328c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x328C 22560 bytes
SHA-256: 2755b5ea1c99d00536b325dc682d3449e8f5d963ad35c63c17a5db114edb149a
font_01_sfnt_off000064ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64AE 19668 bytes
SHA-256: 5e4bc1e521c5052e9cbb43eefcd14a5696c7106cb3bf335172a8b339776674f4

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