Malicious PDF — malware analysis report

Static analysis result for SHA-256 1612984d8394d664…

MALICIOUS

PDF

81.9 KB Created: 2021-09-16 18:01:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9aee2d76e8afd6f9c83cf6e0fc9d4677 SHA-1: 7655d74c575b1db03e769b5bf406e5e379a527d2 SHA-256: 1612984d8394d66456d06d3fd023aa1cd3a720e2775b282f342df0a1ee3528dc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics, including a machine learning model and ClamAV, as malicious. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the overall structure indicate it's likely a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=pubg+virtual+for+android+10 PDF link annotation
    • http://truhlarstvisollner.cz/data/file/59372697406.pdfIn PDF document text
    • http://nhanvietgroup.com/demo/xay-dung-tnx/upload/files/xurazas.pdfIn PDF document text
    • http://mijinmotor.com/fckeditor/userfiles/file/72390894873.pdfIn PDF document text
    • http://wernitznigg.at/files/taseroximowiriwubak.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/12231719103.pdfIn PDF document text
    • http://hotelalbicia.com/userfiles/file/mifalanositexifixu.pdfIn PDF document text
    • https://wineart.online/userfiles/file/15060945297.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/liwofodesazajibovomumog.pdfIn PDF document text
    • http://sinice-rasy.cz/files/file/wumalipobawujutujajevaj.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16306312535757.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138c53ee7f22---tapim.pdfIn PDF document text
    • https://braus.uz/images/shared/file/golumivosuvera.pdfIn PDF document text
    • http://vindindex.nl/images/uploads/lekazipasexogufed.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/61600038907.pdfIn PDF document text
    • https://akgoz.zemta.com/uploads/files/58918420005.pdfIn PDF document text
    • http://godsownproperties.com/userfiles/file/riwawizidoburimoge.pdfIn PDF document text
    • https://jsptti.com/ckeditor/ckfinder/userfiles/files/xipuvozezopuzavavafetuwel.pdfIn PDF document text
    • https://mallorcaboom.com/res/wysiwyg/file/56485218956.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/fec85063ced16aab80b48176b30faa28/nirunemilijulabo.pdfIn PDF document text
    • https://successstudio.net/userfiles/file/vadedurole.pdfIn PDF document text
    • http://lex.tj/img/file/85747463113.pdfIn PDF document text
    • http://neboskreb-irk.ru/uploads/userfiles/files/95706012378.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/sesigotobufajuloxujuwe.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_off0000dcc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC6 17332 bytes
SHA-256: 1905df1759d025e1d2e51f275a1a253e7170b95eac6530d9f2c7d056ac98b077
font_01_sfnt_off000109a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BA 10712 bytes
SHA-256: ac2d7fc36a60f30766acc37f9fe6f81ec2710fcf01f2bb1f9a54003a3b5bd1b0