Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d536fcd3a71638c…

MALICIOUS

PDF

81.0 KB Created: 2022-06-10 05:07:19 +02:00 Authoring application: alearen (via PDF Master 1.0.1) First seen: 2022-07-15
MD5: f554089268c02cbbfacf6cfab9d04930 SHA-1: b6473691f292ab5d8ed863211658c22f8ed9ec7b SHA-256: 8d536fcd3a71638cdcfb27fa374bf427ccc1dd7925fd7532c6d3aaba089fd2c0
64 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, indicating a link farm or redirection strategy. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, suggesting the document's primary purpose is to drive traffic to other sites. One of the embedded URLs, http://evacdir.com/neuroscientist?YmVpc3NiYXJ0aCBtbCAzMDAwIHBjYmV=harem.ZG93bmxvYWR8QlUwTmpOdllueDhNVFkxTkRjNE1EZzNPWHg4TWpVM05IeDhLRTBwSUhKbFlXUXRZbXh2WnlCYlJtRnpkQ0JIUlU1ZA.olhoffen&riads=shahryar&chandeliered, is particularly suspicious due to its structure and domain.

Machine Learning

  • Nyx PDF Classifier clean score 0.1960

Heuristics 3

  • 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.
  • 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://evacdir.com/neuroscientist?YmVpc3NiYXJ0aCBtbCAzMDAwIHBjYmV=harem.ZG93bmxvYWR8QlUwTmpOdllueDhNVFkxTkRjNE1EZzNPWHg4TWpVM05IeDhLRTBwSUhKbFlXUXRZbXh2WnlCYlJtRnpkQ0JIUlU1ZA.olhoffen&riads=shahryar&chandeliered
    • https://techadarsh.com/wp-content/uploads/2022/06/alelym.pdf
    • https://lichenportal.org/cnalh/checklists/checklist.php?clid=21446
    • https://yasutabi.info/wp-content/uploads/2022/06/WALTR_2_268_Serial_Key_For_Mac_Windows.pdf
    • https://hanffreunde-braunschweig.de/wp-content/uploads/2022/06/Hitman_Blood_Money_Pc_Full_Game_Free_Download_Tip_to.pdf
    • https://aqesic.academy/blog/index.php?entryid=1022
    • https://himarkacademy.tech/blog/index.php?entryid=1104
    • https://insightkorea.or.kr/blog/index.php?entryid=3566
    • https://ideaboz.com/?p=11140
    • https://2figureout.com/optare-solo-omsi-2-15-hot/
    • http://www.clyouththeatre.org/?p=6971
    • https://gecm.es/wp-content/uploads/2022/06/Situs_download_bokep_gratis.pdf
    • https://alexander-hennige.de/2022/06/10/farmacos-para-el-corazon-opie-pdf/
    • https://tablerodeajedrez.net/wp-content/uploads/2022/06/ambjess.pdf
    • http://tirupatilist.com/wp-content/uploads/2022/06/Gta_Iv_Backup_Files_Download.pdf
    • http://ballyhouracampervanpark.ie/wp-content/uploads/2022/06/Eassos_PartitionGuru_Pro_3701_Portable.pdf
    • https://www.iltossicoindipendente.it/2022/06/10/ddt2000-patch-crackl-full/
    • https://smartsizebuildings.com/advert/hitman-absolution-pc-windows-8-fix-repack-download/
    • https://mercadobiklas.com/wp-content/uploads/2022/06/Accounting_Rules_For_Treasuries_1992_Pdf.pdf
    • https://ubiz.chat/upload/files/2022/06/vPwsFJrMbIxrzVKCBV8h_10_809f75495d56680f2498d3e0afca2aa0_file.pdf
    • https://ecageophysics.com/2022/06/10/bluesoleil-usb-dongle-drive-v1-6-download/
    • http://www.tcpdf.org
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://www.aiim.org/pdfa/ns/extension/
    • http://www.aiim.org/pdfa/ns/schema#
    • http://www.aiim.org/pdfa/ns/property#
    • http://www.aiim.org/pdfa/ns/id/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000017b4.bin
a217f12862e0ff75203bdd4136ca0d68471050be46bb09aed5306898926ffdd4
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17B4 120140 bytes