Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb69fbc396c9eb17…

MALICIOUS

PDF

47.3 KB Created: 2021-06-09 04:46:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7d6105e1b7e251754f2b26ac084bb67b SHA-1: 6d225f23f26400823f6a28fa005ede5c2b14f132 SHA-256: bb69fbc396c9eb1777645d30bc7ce7f4057fda4a21cf816c82ce63e555f63f75
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 malicious URL identified is https://netcdn.tw/app/431946152/rbxp-free-robux-game-hack. The document's structure and embedded links suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely leading to malware downloads or further phishing attempts. No scripts were extracted, but the PDF's nature points towards a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.tw/app/431946152/rbxp-free-robux-game-hack In PDF document text
    • https://library.iuli.ac.id/repository/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-daily-link_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/robux-game_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/optifine-pe_GM479516143.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/pokemon-go-free-box-march-2021_GM1094591345.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/blox-fun-info_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5047 26204 bytes
SHA-256: bdac781e5e36156a28022a23c95c0a01a78ee7e58dd60c28f49571a730d6e4ea
font_01_sfnt_off00008bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDB 3084 bytes
SHA-256: 4889dc98a6bfd3c9244583f92387be58625a91e7a969778ad35ada89b27ed636
font_02_sfnt_off00009681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9681 18192 bytes
SHA-256: e61f512f98f61f1a0f59d89719ca7360cfe220425ca184df9c952efe69241298

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