Malicious PDF — malware analysis report

Static analysis result for SHA-256 389a1a51daa82f44…

MALICIOUS

PDF

45.4 KB Created: 2021-06-04 02:55:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1b20f6bc9d61b44957df01de2ab2afd9 SHA-1: b26536cff7bb0f9ac931e3738da003c91ab62d7a SHA-256: 389a1a51daa82f4414cec06b9cd1d7368916227af78c4d30724af94dc0ac5aae
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are structured as SEO link farms for game hacks and cheats. The document body, though partially corrupted, suggests a lure for 'Free Roblox Adopt Me Pets'. The presence of a 'download button' heuristic further supports the malicious intent of directing users to download potentially harmful content from the listed URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.online/app/431946152/free-roblox-adopt-me-pets-game-hack PDF link annotation
    • https://elibrary.sttar.ac.id/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/aternos-free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/freespins-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-roblox-accounts-2021_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
stream_004_off000051ab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51AB 25604 bytes
SHA-256: e130d6e66cd54fba33d01d1045bb69e5dc116ddeea5776e23486501d36cbb572
font_01_sfnt_off00008d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D70 18752 bytes
SHA-256: 52cfe92e200dfff1806eef07ab2f46449592264c572d29f9bbb977df1fa2ebc4

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