Malicious PDF — malware analysis report

Static analysis result for SHA-256 7095456c2a6fd128…

MALICIOUS

PDF

98.3 KB Created: 2021-06-14 12:22:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: b6a455b7ad12965bb4c473a5852184cc SHA-1: 883f65b1a873318866676496da1a47ab8c70208e SHA-256: 7095456c2a6fd1288bf555582ef3718112c221631fc3567ce57f3ae8d9456dc8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links to compromised WordPress sites, likely serving as a link farm for phishing or malware distribution. The presence of a 'sims 4 needs cheat ps4' URL suggests a lure to attract users interested in game cheats. ClamAV and ML classifiers strongly indicate malicious content, and the document structure points towards a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://chcial.ru/uplcv?utm_term=sims+4+needs+cheat+ps4 PDF link annotation
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1dc2c2b96---87877154246.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/7bt26um0sk5j46coinkdvjb0fu/78209184632.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/rkgbi47stuhb2tmf59bu72nsov/banubokukuvajazawuluna.pdfIn PDF document text
    • http://psychoterapia-przemysl.net/img/userfiles/file/jatud.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6a2c16d81---388234978.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/fuzifogusikedemozofimagi.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/40630a4b145d3c1f6fbc5bc920230cdb/15088918947.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d2dcd1d47---wefewepewuze.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/15358688335.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/zumoramaniba.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/u38ap9ju5q9nnbvnru39l0qq95/57545590573.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16095e9f139ed1---81911873607.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/492b09690efb6a5eb120c7f5eca7bbed/53710425879.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/72872426362.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/24417799262.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f88e945a2---dejilagi.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a5ece493a---86374707677.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609910ed99f57---wupupumukim.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/18857132719.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000143b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143B4 5376 bytes
SHA-256: 3833ba93aa7ef466805d85c02fdef52246546f829370b6c606440ea345bc2aea
font_01_sfnt_off000155e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155E0 11260 bytes
SHA-256: 9ed7ecee51c8d57c2289fd14aee7a1d2429f2c2dc0772927818f6d13125356c8