Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee7bd227f19c307…

MALICIOUS

PDF

90.0 KB Created: 2021-07-01 17:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4e55a1e1131a98161e90668c48928ceb SHA-1: cb58db749e608cabf5cd9bc33f879406f3408cf3 SHA-256: eee7bd227f19c307a247cf7b4a5f94b097e2b1f6f83acefd5f2a7023dc69231d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to websites hosted on compromised CMS platforms, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://coretry.ru/uplcv?utm_term=fifty+shades+of+gray+read+online PDF link annotation
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4d3cc14be---xetelubulu.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/sarekogi.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/ludajidesaf.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/90877122090.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/b75lhku8if3fdqgd8euggqvns9/wuganeguwexekunizawereb.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/dkqea1iu58bsufgg9ibv2i5m7p/getupiwigulatoxipelopibup.pdfIn PDF document text
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/73631745436.pdfIn PDF document text
    • http://marty-triple-m.ch/inhalt/files/82126145546.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/kazedoboken.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16094ba1f322ed---tugusavabitojaxuxaxax.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/m4dcgl3mnvdhcb8um7grl2fk33/47143493084.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/8008832295.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/oja77qb1dogi61l05rp5jo4t57/12594569307.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608245ffc9e6a---ronefazuzekeviwarolug.pdfIn PDF document text
    • https://callalilyvn.com/upload/files/vejifoforim.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/697a5a955e601ce1398ce40f4c4dd3e6/75598774961.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/toberazigupox.pdfIn PDF document text
    • http://vivo-mebel.ru/upload/file/54738270512.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/pfvh7ptcpqu7r8vqb5vavo1562/87308581300.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6ace63fb1---soginetabudon.pdfIn PDF document text
    • http://livingkaneohe.com/userimages/79767686317.pdfIn PDF document text
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/nemosaninopamezalebilabu.pdfIn PDF document text
    • http://bachova-terapia.sk/images/file/51602957251.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_off0000fc8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8A 10724 bytes
SHA-256: 75030610325ba5f6c536cce12d1cdbd68533e4d7837e03cb02b46faf10ddf6ba
font_01_sfnt_off000114e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF3 17412 bytes
SHA-256: 39b4d6a6fed5bee86115ab2bd10e2e8a06e650b6ce19d2c507453acf8e604f27

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