Malicious PDF — malware analysis report

Static analysis result for SHA-256 93a93842de54ff6d…

MALICIOUS

PDF

34.8 KB Created: 2021-06-26 09:30:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9606d2b8b508c8fe413e1274b7134ea1 SHA-1: 6cc2f0ab4a6cc1d836e58b7d4f59622f4b08185e SHA-256: 93a93842de54ff6db83cac15475a333f8606ec998dd7321ca8dea56345d5eb90
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a prominent link to 'netcdn.co' which is flagged as a malicious redirector. The document body and embedded URLs suggest a lure for free Robux or game hacks, a common social engineering tactic. The presence of a visual download button and password archive lure heuristics further support a malicious intent to trick users into downloading potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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-without-asking-if-you In PDF document text
    • https://library.iuli.ac.id/repository/invisibleble-hack-roblox_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-hack-a-password-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-hack-winrar_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-get-into-bloxgurg-for-free-with-no-robux_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-change-robux-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-cheats-free_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-cheat-xbox-one-argent_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/awesome-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/guess-the-drawing-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/games-on-roblox-that-give-you-real-free-robux_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-roblox-exploiter_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_off00003133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3133 21720 bytes
SHA-256: cbc1e586f6ebd738bbe5288a0c1936b256537425a39f6ea854217bd303e91ae0
font_01_sfnt_off00006102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6102 19700 bytes
SHA-256: c16444280b6d2d48b7b07ca947da00473fb36712234e99e0b9beb6748f30b12a

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