Malicious PDF — malware analysis report

Static analysis result for SHA-256 a13bfb0d02ad13f4…

MALICIOUS

PDF

46.1 KB Created: 2021-06-13 21:41:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3e22f8ff9ced8148003d0b2a8dbef120 SHA-1: 0aa921ef959684be387203c77ab82c062f5b456c SHA-256: a13bfb0d02ad13f4fdd4d626228ea3a6b355a6072aa810a10a7d44d5c5ca4c0f
82 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a primary external URI pointing to a file hosted on netcdn.co, likely a payload. The document body and heuristics indicate a lure for free Robux or game hacks, a common social engineering tactic. The presence of a "password-protected archive handoff" heuristic suggests the downloaded file may be encrypted, further indicating malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 4

  • 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
  • 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 http://netcdn.co/app/431946152/free-robux-3-pastbin.com-game-hack PDF link annotation
    • http://librarystkippgribl.com//repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/google-moon-active_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/master-hack-coin_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-free-items_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/tiktok-free-quotes_GM835599320.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/is-there-a-way-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/roblox-catalog-hack_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-roblox-accounts-crack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004954.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4954 26588 bytes
SHA-256: 8e18105d8f4cb43577ee7aba08d83146a7c1cfcb91bd7eff477d11ede1f36ef3
font_01_sfnt_off0000853a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x853A 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F25 19120 bytes
SHA-256: fe3d1e618d9c8951f3733e7e93ec29c898070a7d9483f807d6b8d1944be72c52

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