Malicious PDF — malware analysis report

Static analysis result for SHA-256 a47f805ed3324478…

MALICIOUS

PDF

34.5 KB Created: 2021-06-27 04:27:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 749df51ed5afbb58c13af4a9e778bbaf SHA-1: d0272d2448976836832a70f6f371744b831fcd38 SHA-256: a47f805ed33244789881bdf2b8c424de800eb19ddd2b382a90f5609c75194252
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free Robux'. The primary lure is the URL http://netcdn.co/app/431946152/roblox-hack-bloob-game-hack, which is flagged as a known malicious redirector. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely for credential harvesting or further malware delivery.

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/roblox-hack-bloob-game-hack In PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/how-to-hack-into-someone-accont-in-roblox_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/how-to-get-actual-free-robux_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/free-roebucks-no-human-verification_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/roblox-speed-hack-feb-10_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/coin-master-hack-without-verification-for-iphone_GM406889139.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/roblox-cheat-speed_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/free-roblox-robux-generator-2021-no-human-verification-and-survey_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/free-roblox-games-for-geust_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/how-to-hack-someone-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/roblox-wheel-of-fortune-hack_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/hack-robux_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/wurst-112_GM479516143.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_off00003027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3027 22656 bytes
SHA-256: 1a4ac58c9eb9399d33e6bcb33cc083815f031489df1208044a6a17223748d771
font_01_sfnt_off000062ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62AD 18656 bytes
SHA-256: c0e3bc160ec821038b328d045f40ff375a03f7bc390fe6c9807bc39c1d4a7413