Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1834de1b65c2c39…

MALICIOUS

PDF

35.1 KB Created: 2021-06-28 10:08:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e9f2bc62d3af6bfd10d69deb7c2fb2f2 SHA-1: 1da13712fa274e5044a6fa1bf002d4560a9807a7 SHA-256: b1834de1b65c2c397e5bae7791f4fb532191a6518a23b1ed751f220d27f7718b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, specifically advertising 'free Robux' or game hacks. The primary lure URL is http://netcdn.co/app/431946152/free-robux-alien-game-hack, which is associated with malicious redirector infrastructure. The document body and embedded URLs reinforce this theme, suggesting a phishing or scam attempt to drive traffic to potentially malicious sites.

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/free-robux-alien-game-hack In PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-roblox-promo-codes-july-2021_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-promocode-hacks-pastebin_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-the-quarry-hack_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-dragon-ball-af-hacks_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-spins-for-coin-masters_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-im-gay-roblox-shirt_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/minecraft-pe_GM479516143.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-apk-hack-no-survey_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-get-know-it-all-face-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/hack-avatar_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/coin-master-hack-1021_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-robux-with-no-app-download_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-roblox-fe-scripts-pastebin-july-2021_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/i-robux_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-get-free-robux-2021-november_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/5-games-to-get-free-robux_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_off000031e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E6 22708 bytes
SHA-256: 44ae5a2a25005f980a6ad556d4a0fd14330b2f1aaefee0440fd0e0e2f315424b
font_01_sfnt_off000064b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B8 18912 bytes
SHA-256: ce6cf2235c68e65689b941899987cd5998b6fa12356c77046b2671244217b138

Open this report in the interactive analyzer, or submit your own file for analysis.