Malicious PDF — malware analysis report

Static analysis result for SHA-256 c378b5f296259de8…

MALICIOUS

PDF

35.8 KB Created: 2021-06-19 21:01:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9ba6e5bc84657f10abb94a4581c4d85f SHA-1: 96cacfbf6b73bd4c412d8b4e7419763be9cf89a4 SHA-256: c378b5f296259de8d52dbf381af55daab3713b01d0f32cfb6d886150400ad243
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirector infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary lure URL is http://netcdn.co/app/431946152/how-to-hack-robux-animin-pannel-game-hack, which is flagged as malicious. The document body and embedded links suggest a social engineering tactic to trick users into visiting these sites, likely leading to further malware downloads or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-hack-robux-animin-pannel-game-hack In PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/robux-sign_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/roblox-free-models_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/roblox-sexually_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/how-to-get-free-hair-on-roblox-on-phone_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/free-robux_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/free-tiktok-accounts-and-passwords_GM835599320.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/descargar-hacks-para-mad-city-roblox_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/roblox-hack-codes-2021_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/free-roblox-promo-codes-september-2021_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/roblox-dowlowd-for-free_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/get-me-robux-for-free_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_off000033ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33EF 22400 bytes
SHA-256: 0c7652e7682d2fd05c4e0411cc4afc6123c784f27edf24f71a48018312d7b140
font_01_sfnt_off0000659a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x659A 19492 bytes
SHA-256: e09864866dc555a32930bef6a01efb81470809b0e1253dfc1e8c96a70c9d0fbe