Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e892865ad7153b5…

MALICIOUS

PDF

94.8 KB Created: 2021-07-08 13:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 53f670a25d0f36ad4fb741645a19d763 SHA-1: 04a98456aeaa3a9ea40bf717afb33c2eaa409eb6 SHA-256: 2e892865ad7153b5c2af9189f896f7efc897cec02d1e222382636af3a6ece4eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. It contains numerous links to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests the PDF is intended to lead users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bringem.de/wp-content/plugins/super-forms/uploads/php/files/3e8c7b2c48005b6db75cce7bf56a3dad/nugofez.pdf In PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/jv61mjff7h2nrhcl3pu42u76al/tulizesobo.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/322fb4fce3de69e52530dfbf80f3126d/23244281284.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a63f3aca66e---silamikijum.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/purarudadamisunegalexoko.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a678535f14a---terisojetomuvipaxaxo.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cf88d560848---dadixorenuluf.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/libokubofepikapasiri.pdfIn PDF document text
    • https://free-spirit-city.eu/uploads/wysiwyg/files/16004624269.pdfIn PDF document text
    • http://coytex.net//ckfinder/userfiles/files/zinubona.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/korafewotokawezix.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5177307174---46351291332.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/a3e1616e809d44df3d42c43c3e5b942a/jumivilusigowozajafima.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d2313896ff6---notonoluw.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/dojuwexudinulodala.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bffe72c9af9---leligafefelimasetakudiw.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16070a23131f99---43798175590.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/4r8cf2n5isob6lkd751d7sgkh0/38014357868.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608929071a546---68888181444.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/99372048551.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/dusukuzosesamedatabu.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/91509284633.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/edbe6a37ece5b707f236b5a3ea0ad8a9/gatorozejoselipip.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/62570800762.pdfIn PDF document text
    • http://hamdard.com/hamdard/app/webroot/img/ckfinder/userfiles/files/58335895726.pdfIn PDF document text
    • http://scheiden-maassluis.nl/uploads//file/67562309546.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=sindhu+bhairavi+serial+full+episodes+in+tamil+free+downloadPDF 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_off00010ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000126ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126EE 11228 bytes
SHA-256: cd6b81972127d35681ab1da0c76d774772fd137f4c0d70196f9026bfbbb1acef
font_02_sfnt_off000140d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140D8 17024 bytes
SHA-256: 0ab774aa9158f69a9367f58afa4dc688ceb584738d98938ae17d5ea6b15b457a