Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eabb473cd460145…

MALICIOUS

PDF

72.3 KB Created: 2021-09-01 20:55:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 05d133496aada12534992ee8feb4d0a3 SHA-1: dd127d40d7d8e2fc86b0fe35fc9e267b7a952574 SHA-256: 2eabb473cd46014593bba7f13a81dcfb569711c25d9a0a45c1d9c0f845110527
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous links pointing to compromised WordPress upload directories and disposable hosting domains. The heuristic firings indicate a link farm designed to direct users to potentially malicious content, consistent with phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://naturabliskociebie.pl/userfiles/file/23850510052.pdf In PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca73053b74---vaverekixasujezokusadaz.pdfIn PDF document text
    • http://bundoreh.com/fckeditor/files/file/86867818269.pdfIn PDF document text
    • https://reinigungsfee007.de/wp-content/plugins/super-forms/uploads/php/files/12kqi0cra7ovn6jine3vd3lcu7/nejerimasemozefutuwuronav.pdfIn PDF document text
    • https://www.saammohaseb.ir/wp-content/plugins/super-forms/uploads/php/files/b821e7affa4f71dcb1e44963e40b9044/88848687496.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/94940521518.pdfIn PDF document text
    • http://cuacuonnhaxuongbinhduong.com/upload/files/kotedigezotoju.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/witifisulogujipopepiroma.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612922ac685ff---danevegepelazufafi.pdfIn PDF document text
    • https://magerp.org/upload/files/24434876200.pdfIn PDF document text
    • https://imahima.xyz/js/ckfinder/userfiles/files/gaveva.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/e3ea61db9061a16a0a78af478fb23ca9/xenuzapatabapexiju.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/ppg1m0hqu4cd0en0lseaks1vb2/76462086632.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160feb42a8d95a---jakibitemawilotof.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/11854203bccdcc53ee212b1f0b35d397/81073886957.pdfIn PDF document text
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/vivilugonixawa.pdfIn PDF document text
    • http://galluccifaibano.it/userfiles/file/21584144379.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160e4a80800e2e---31059549488.pdfIn PDF document text
    • https://ddc-touggourt.dz/ar/files/jinuvilizix.pdfIn PDF document text
    • https://confidence-ist.com/ckfinder/userfiles/files/33039408166.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2fdfc02b97---24084959470.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/wazunuwet.pdfIn PDF document text
    • https://chinatupai.com/web/js/ckfinder/userfiles/files/lazikapejojomuvet.pdfIn PDF document text
    • http://coss-wynn-reunion.com/clients/d/db/dbe3622004495b304d8703879a486b7d/File/baxaxejoleniporejof.pdfIn PDF document text
    • http://www.ettermanenterprises.com/ckfinder/userfiles/files/96239604444.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/53078105805.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=chapter+8+of+the+traffic+signs+manualPDF 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_off0000b9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B3 15516 bytes
SHA-256: 8e2db876b834a5ea830a1bfbfb9f42e7798e21068534029d6fe5c7657e70f832
font_02_sfnt_off0000f97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97D 11268 bytes
SHA-256: 13f71ac79001aad8d0bc297bf84a845acbd45ae71beac95dddb63bbf33c067c8