Malicious PDF — malware analysis report

Static analysis result for SHA-256 70575a6cb1e94ebc…

MALICIOUS

PDF

82.1 KB Created: 2021-09-12 14:06:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cc1c4889cfc1f695035db95ed9876feb SHA-1: 204b51ba1c5563534d1adb114d8598e23d7c667d SHA-256: 70575a6cb1e94ebc5c5aa65f1e48dde698ed3ba19e615b1037c8e9da0598f650
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://biblioteka-belzec.pl/upload/files/31831104443.pdf In PDF document text
    • https://deesudcoolingtower.com/userfiles/file/71676653367.pdfIn PDF document text
    • http://hitmet.slektenkaas.com/bilder/file/liwisuvekinunudider.pdfIn PDF document text
    • http://sjanzee.nl/file/34443174860.pdfIn PDF document text
    • http://rfychina.com/upfiles/files/1631168448233.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/72533844e3b3451ff9e7b09167054cbe/melojot.pdfIn PDF document text
    • https://onlineadda.net/ckfinder/userfiles/files/kawadozivusetutowaxebo.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/batowageguved.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/womusizanutafa.pdfIn PDF document text
    • http://caudafotografia.com/userfiles/files/61334895092.pdfIn PDF document text
    • http://madiran-cruduparadis.fr/ckfinder/userfiles/files/xezunusoviza.pdfIn PDF document text
    • https://a-guskov.ru/uploads/files/6988895315.pdfIn PDF document text
    • http://2222.netsociality.com/upload/files/7037220796.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/7lan589ho2sh2j88a7lnmsuqfc/nojodowadevonifajifazurad.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/0e8130a6b943c15e0892a58e73f53d5c/22293735192.pdfIn PDF document text
    • http://desiaussies.com/ckeditor/uploads/files/74249159388.pdfIn PDF document text
    • https://nitdgp.ac.in/uploads/userfiles/files/zuwabimugit.pdfIn PDF document text
    • http://iberia-ex.com/images/blog/file/10283582385.pdfIn PDF document text
    • http://sterenstein.ru/userfiles/file/94508454475.pdfIn PDF document text
    • http://finalbrand.cz/upload/file/kotidibuzinag.pdfIn PDF document text
    • https://blogsma.com/files/74769090170.pdfIn PDF document text
    • https://marmetal.cevhertemizlik.com/userfiles/files/laxuvawu.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/lakometudumegujomil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=hero+2015+full+movie+download+hd+1080pPDF link annotation
    • 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_off0000d547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD547 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED59 19164 bytes
SHA-256: 6b821c3e79d29ccd85d49e241acb6fee3d622dcb2872a055b3b469cf992b2bf2
font_02_sfnt_off00011fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC0 11376 bytes
SHA-256: 3546d3bc468edbee9df28eed4d9dc4eb0dfd54e1560c14bce917eaa5c09c8804

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