Malicious PDF — malware analysis report

Static analysis result for SHA-256 07400f723e858426…

MALICIOUS

PDF

94.5 KB Created: 2021-08-27 04:36:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bb058c50f8a746a62960fb0474d3a121 SHA-1: b79ed38426fa9cfa84b36a9f60b8a634c105295e SHA-256: 07400f723e85842616bd4a38e2226da37cccdebadb58bff9e480f69112a92bfc
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://chcial.ru/uplcv?utm_term=motion+intro+templates+free PDF link annotation
    • http://vce34.ru/attachments/file/safenane.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/addf09bc04bbe2cff4e6eedfc60e11f9/91453432161.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084d5a99f9d8---sogetivogosixesigefofe.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/sedatuwekigaxetonawinusux.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/fc0bf55309e7ee12c7a16b006e877dd8/lixoxunodar.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210524192805559.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/kheemd2u1mcvh9j8b7r8mblsp0/jilabuxedoxojawexas.pdfIn PDF document text
    • http://taiwanquinoafamily.com/shopadmin/upload/files/sugifolamoradizure.pdfIn PDF document text
    • http://qianxish.com/ckfind_image/files/68545050945.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111dcffb02e9---55375132342.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/29194117435.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/962e45c7137e131081df3fb0bfb58095/jovovanube.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609139f477ec2---jiwazukepidalanijagibe.pdfIn PDF document text
    • http://solyaris.pro/admin/ckfinder/userfiles/files/10040001146.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/15a2c3323b05615559bfef4191d6fd98/gajururabogeluje.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/abe407cdb1f088bf99646de9da1de415/57731399184.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/58774140396.pdfIn PDF document text
    • http://deficanderel.org/clients/6/67/674a09facce11b7629d390eef9534ff9/File/rutawepopuxikuzojun.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afce0952147---56085597213.pdfIn PDF document text
    • http://starrsgazette.com/admin/images/file/73091187049.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.info/upload/files/sidijedixalodadulofizumev.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/862e9bd685a35b3f1d3792353d0b4d00/72733587303.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160e4446dbff9a---84825596669.pdfIn PDF document text
    • https://tselectromechanical.com/uploads/CKfiles/files/vaziratos.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/3863819245.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea00d7653d---dozuga.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_off00010f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F59 10512 bytes
SHA-256: fde11e6fef004e1239e5bb6a7e7b3c26287302202b52877a25cb8455e7cc0928
font_01_sfnt_off0001273e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F50 16872 bytes
SHA-256: d0ac905fa03a6f574f48749daa0187a419f982a3e17d953b1d158cafd641aa36

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