Malicious PDF — malware analysis report

Static analysis result for SHA-256 57dbbca058ec9b4d…

MALICIOUS

PDF

78.6 KB Created: 2021-09-15 14:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: dc05209b29ecb8d5b4158558ca8baae5 SHA-1: 450bb6bbf75ec3a26d8519311b60ed81853df5b6 SHA-256: 57dbbca058ec9b4d9751298358c28a4da1b6b98d01902a4d563c3ecd74cd69ea
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning model assigned a high probability of maliciousness. It contains numerous external URIs, many of which point to disposable hosting and appear to be part of a link farm. The presence of these links suggests the document's primary purpose is to redirect users to potentially malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://ketchas.ru/uplcv?utm_term=jawapan+jom+teka+teki PDF link annotation
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/30574797279.pdfIn PDF document text
    • http://japanbizkorea.com/userData/ebizro_board/file/xurovorupuloxadazoxim.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/61644187951.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210913192004789.pdfIn PDF document text
    • http://sineadstone.com/userfiles/file/xevotiwuvanuvebibi.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/13985752667.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/kibuti.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/domikanu.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1614161e81fb1e---dagowogunifu.pdfIn PDF document text
    • http://phunphu.com/userfiles/file/21470228375.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/80426312472.pdfIn PDF document text
    • http://roseeskin.com/userfiles/file/20210903015423.pdfIn PDF document text
    • http://chip-chup.hu/upload/file/76465267644.pdfIn PDF document text
    • https://virtrade.gr/userfiles_lybo/file/gowibosuwox.pdfIn PDF document text
    • http://www.fashiongale.ro/userfiles/files/96374869217.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/56478766103.pdfIn PDF document text
    • http://xinyuemu.net/assets/202109/files/20210902192147414489.pdfIn PDF document text
    • https://anne-berger.de/sites/anne-berger.de/files/fkcfile/folobegugafasomapesoxad.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/34116253290.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/kenadasifomuxajop.pdfIn PDF document text
    • https://breedlife.com/upload/files/potaxorijidexevuvixe.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/38766245533.pdfIn PDF document text
    • https://braindevelopmentmaps-org.neurondevelopment.org/userfiles/files/rumukovilewazobonefama.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE10 10400 bytes
SHA-256: aafaceea8bd3f117e6446bf7133454179c0a370530a4a14b473cc4a5688a7b09
font_01_sfnt_off0000e598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE598 18552 bytes
SHA-256: fdcd07c6839de906599a12c93fc26f39c7671150385ced7504f336866d3b618e
font_02_sfnt_off0001155c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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