Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ee6e6adc3cb78c…

MALICIOUS

PDF

74.7 KB Created: 2021-07-17 18:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 257c10fa5c8096c024b2e6495f7f8f77 SHA-1: 9661eb5f01b2ae05168dece68470498d71ab5294 SHA-256: 01ee6e6adc3cb78c5ae5a952b85f5644edd037666dbfbb193879f1d129fa3160
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document exhibits characteristics of a phishing lure, employing a link farm hosted on multiple compromised websites to direct users to potentially malicious content. The presence of a 'download button' heuristic further supports the intent to trick users into downloading files. ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high confidence score indicate a malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/2633d460f7b53f50f4927df3f84ad78f/45449066123.pdf In PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/751rrpdne8mft82su7evck35dq/butevat.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706c2e07f24---bepipodaku.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/9969c0ddf6076ebfd5c28bbf4be44dca/pagiwunoba.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608794b3dda36---26696414766.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/61613917743.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/4f14c239cf89dc4b9c250da2de3de2e5/basuvilanazikamuziseg.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc5d2d365c---gomik.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d66867f0805---durodisowevejabivinixap.pdfIn PDF document text
    • http://ubest.ru/images/file/dumuvoravosomedisoradosa.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/xiboranunux.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/45510970733.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d73d070425---56441328067.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c525736ed---13185973546.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/99246479222.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a63b52279b7---jobisimevolaxev.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160747a4035db0---60525050689.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/26ccf77ba2928cec1a4aa3da2051699c/momurekikonejube.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/sagumanopizoxa.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/56758903512.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160999488afa72---88589890966.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084142a2279e---vamujiranove.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/44201418890.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/guriturodinugukotikuv.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///38026900695.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703793e0643---deruki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=preliminary+exercises+in+counterpointPDF 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_off0000c1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D4 10852 bytes
SHA-256: 82320e20dbf45d7455f07d0a49edc7956cc0ec633cff0618a3212916a428809c
font_02_sfnt_off0000f2eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EB 16408 bytes
SHA-256: cb973c7f54e121b8b67f0b3b7b686c3d5d217e77e27136a28696aabb1261f98c

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