Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7d2362bdc3eca5…

MALICIOUS

PDF

84.1 KB Created: 2021-09-12 15:51:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-22
MD5: 8b85f8ee2b3f0490f201910ef4f22977 SHA-1: b39360d142ade8fe8d572451a5a03fa5024feaaa SHA-256: da7d2362bdc3eca5b63e6c820f8403be255e024200cb3d3c662ac50424711b29
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://etadelloro.it/images/file/10277957808.pdf In PDF document text
    • https://at-studio.tw/app/webroot/userfiles/files/20210910_171017.pdfIn PDF document text
    • https://minjar.mebel18.com/uploads/files/ketipirewo.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/21304499697.pdfIn PDF document text
    • https://birgatour.mn/js/ckfinder/userfiles/files/59775286737.pdfIn PDF document text
    • http://tearose-kitchen.com/sites/default/files/images/imcefile/gunexuwadax.pdfIn PDF document text
    • http://nena-artspace.com/ckfinder/userfiles/files/92007149788.pdfIn PDF document text
    • http://hoangminhceramics.com/app/webroot/uploads/files/zatelezolebosogesinip.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/74827178725.pdfIn PDF document text
    • http://eatoceanic.iorderfoods.com/uploads/files/37746756388.pdfIn PDF document text
    • http://3qbuy.com/CKEdit/upload/files/jetolo.pdfIn PDF document text
    • http://langmoon.jp/js/upload/files/58257946364.pdfIn PDF document text
    • https://www.e-oswiata.olesnica.pl/ckfinder/userfiles/files/kagav.pdfIn PDF document text
    • http://meijialx.com/ckfinder/userfiles/files/94935327440.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/xawubokireweduwi.pdfIn PDF document text
    • http://www.saletime.gr/admin/fckfiles/file/zibosijitos.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/dml6cjkgmsg9sgt4mifgo92soa/44204921801.pdfIn PDF document text
    • http://yjeverspeed.com/userfiles/file/70562313704.pdfIn PDF document text
    • http://naturenhuman.com/app/webroot/userfiles/file/vaxapazuvepixesilato.pdfIn PDF document text
    • https://tsegypt.com/file/kitufudipiwezulofojev.pdfIn PDF document text
    • http://hotel-gerard-dalsace.com/upload/document/xogulitufinavobekewuwid.pdfIn PDF document text
    • http://www.pibmg.com.br/ckfinder/userfiles/files/files/jivopolu.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/90060991720.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/71181313506.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=como+descargar+mapas+para+minecraft+pe+androidPDF 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_off0000dfa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C0 10948 bytes
SHA-256: cbeaeed426ec4ffc6d2d59c9bcb144fe9f3111ab3cff728959b51b138f7eca77
font_02_sfnt_off000110ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EE 18616 bytes
SHA-256: a96b3247e2ae235b79b03193d61841f3521dddd49606b458104c46ef087bca4c

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