Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6e22b554b68dc9…

MALICIOUS

PDF

77.6 KB Created: 2021-08-02 15:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 096af77fc55e93110baebf6df136a4c3 SHA-1: f55b2c2969f8bf769512077d30ad5dfd6882ac82 SHA-256: 7e6e22b554b68dc9548611fcd2f6e3574840edd9b5c746cfe9df72e65b12049f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains numerous links to external websites, many of which are hosted on compromised WordPress installations. The ClamAV detection indicates it is a phishing trojan. The embedded links likely serve to redirect users to malicious content or phishing pages, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3684

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
  • 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
  • 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://infrive.ru/uplcv?utm_term=what+is+the+10+day+green+smoothie+cleanse PDF link annotation
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/1f62d0c93e82da2f6af054f687ffe6ad/88610900350.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/dfba45d93f7071929a67361d094669e7/kukabofusezasidiva.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874385ce838---rudujimulib.pdfIn PDF document text
    • https://parfumzone.ro/files/file/zakoxato.pdfIn PDF document text
    • https://kenadong.com/contents//files/84558610211.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a01fd84f757---36811016666.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/68osojh38uh9b7dmq74b5kk32q/28631309906.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/fe1e4aa9715de620df2af58e29417232/zidewepetimaja.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/2ce3afff43656ad74d7b5fa4d2a9e817/zujim.pdfIn PDF document text
    • https://airflow-skateboards.com/userfiles/files/47227559459.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bd60305330c---51837782842.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/kebupizovumexiwosiviku.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160989cbb5af94---xulawosu.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/wupilomufamanigujex.pdfIn PDF document text
    • http://southeastern61.com/clients/0/07/0748cf78e2268043913ae7c14e09e996/File/51447463822.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/lizasubupuzajo.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885b438c378---sadifipiwaf.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/ruzofalisigagefuvuzoloke.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee2ac35d0c---7550455343.pdfIn PDF document text
    • http://jar-ted.pl/file/23135999561.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a0273d47fef---39876313393.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/2dd7b79a7e809397c350cb72722236b4/xukofavuwokaruba.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16093f397a57ab---muven.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abde3b11514---difufesazeberuzibu.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16071af23690b2---wowukukukonowejasu.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/givafasibosalededitowuj.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f71a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71A 17820 bytes
SHA-256: 05127749afd26ad63da8171b7a112bb1094bf6620281abba86f14a5c0d28ef04

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