Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb9c02eba0d1f64…

MALICIOUS

PDF

84.2 KB Created: 2021-09-04 21:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 96c8a4d73e7609405260ba55d6083a39 SHA-1: 73ccba0e898c9eafa579472578cd171ea42c14f8 SHA-256: feb9c02eba0d1f64ab658b666aebde0728c56fbe3722ab0557ad2ca3bbf144cd
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple external URIs and a link farm heuristic confirms the attack pattern of directing users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/uplcv?utm_term=pdf+translator+adobe PDF link annotation
    • https://celebicatering.com/upload/ckfinder/files/fozaxoto.pdfIn PDF document text
    • http://1-cx.com/ckfinder/userfiles/files/38417229934.pdfIn PDF document text
    • https://nycsmindia.org/ckfinder/userfiles/files/27598460922.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d31963cfc9---60608107773.pdfIn PDF document text
    • http://vejwun.cz/images/waxuletibijut.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/dalalomopuzedi.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/gkdjlsceu3dek0b7eemfdeqt3n/45968121875.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d2490034422---15621344560.pdfIn PDF document text
    • http://drivingtesttips.ie/fckeditor/userfiles/file/rovelirulet.pdfIn PDF document text
    • http://unseretochter.com/images/file/99864726220.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/df46588c052909126a0cda01e2367c6d/90270489835.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/85723870297.pdfIn PDF document text
    • https://bursac.net/userfiles/file/46776326522.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/kopobesox.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/kafoli.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/asnca93tm6740qj65cn05h3ts2/moramumeziwifevogin.pdfIn PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/fowenisegazi.pdfIn PDF document text
    • http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/segakapulajexakulorip.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/411a76c9a73391334d87b243d1449d0d/busugixezuguvarudix.pdfIn PDF document text
    • https://ensegun2.com/ckfinder/userfiles/files/taziminotenemivurivi.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d1e687289---29256818817.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/2245c53476d2609915e1ca1f38f84cda/54301896711.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/68011481262.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/gukexajajodobunebokaxa.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name//files/lowarimumewaxapinuravo.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/45544476357.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_off0000da11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA11 10396 bytes
SHA-256: 434bfb5292f76a2b5fc2e30fd2e937740d7d0e862343af80083ff8e25cdbaa7c
font_01_sfnt_off0000f1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CB 21964 bytes
SHA-256: 829b17c121bce96689ecc9df2e62fa8ec5548f8becfe7e0c9d74d70b3719c3e4

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