Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bc982af60f54166…

MALICIOUS

PDF

74.3 KB Created: 2021-07-25 00:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fba742abe720ad1ba2c167f6962a1db1 SHA-1: 66d2d6cf593cafd9ad3d6e2ae48469fbb59499de SHA-256: 9bc982af60f5416608a0a6dad06d1877639c3037e3bd2fe02c981e3860575652
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, identified as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to manipulate search engine results or user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16083f38179afa---rixifivifunoxizukixu.pdf In PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/c220e758137a737af2a224b59e67eadf/98094443584.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/2d2c47c92b21abf0c6284654538a7e5d/teveta.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1523702cd---xanetolizoxag.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/pij9526ncdkoque2bdgas714i4/58496854673.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a64b164cb5f---85927140424.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/lb3mm3pv8f16mtt0husqpf0kau/8304502912.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/3f58afb3f7282cdfcfc748c35d688de5/80604092930.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/c6e2f445818e51aef96f7ec7c22bd359/25120579876.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/95248837821.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/94518337688.pdfIn PDF document text
    • http://katheran.com/clients/55933/File/18868374487.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/d126b15084812d1560acac70f171ed21/finafapupuvilumuded.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/2cbfe17e855111874854f127ec786372/nitenotoro.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c57cf0d7e2---dejiveposirak.pdfIn PDF document text
    • http://pm-property.pl/userfiles/file/83857366593.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/ae71364e2c1be7c09714c37fac93210a/58753252743.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/tozogol.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/35mmnkeu0e5odn88k0ril7kco2/73770295616.pdfIn PDF document text
    • http://hockeydh.com/files/ups/files/nusunomolofa.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/d1a69be883bdd4bea58ccc714457c2cf/34938895581.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b89e75ba3---85916311513.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/newij.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607c670bda23d---jezubosibarevewez.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/edc79a53c3c9a86bbdcabc23bb09d8e7/79040210830.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=hindu+marriage+biodata+format+in+word+marathiPDF 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_off0000c226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC226 15692 bytes
SHA-256: 07d9ddcb1da6b7254f0780c74dc47bc74252742ed2a685eed968990945492789
font_01_sfnt_off0000eaa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C0 10904 bytes
SHA-256: b4deeae1dce886afe49cb471a9eee93b1bc5510562dc9bd48f5007732d54710f