Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7eb648115270e5…

MALICIOUS

PDF

94.5 KB Created: 2021-09-07 06:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 650d643874cc4d1c14539f10848c4316 SHA-1: 03b6878913054c94b816ec340e1ea425d51d0ad9 SHA-256: 9d7eb648115270e503bcba38b820873bbc7c1de66d33ca9552d69c0e1a981708
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

This PDF contains embedded JavaScript and numerous external links, many hosted on compromised WordPress sites and disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to download a second-stage payload via the embedded JavaScript and external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://wastran.ru/uplcv?utm_term=book+architecte+d%27int%C3%A9rieur+pdf PDF link annotation
    • https://parklanehotel.asia/userfiles/file/modapugofojupoxawaruf.pdfIn PDF document text
    • http://gibisch.org/files/files/81554265616.pdfIn PDF document text
    • http://kurumakaitori-one.com/js/upload/files/vewejuvid.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32cba276bb---ganuzovoso.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/xunifejuwanasap.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/vikadidemijanajoxozo.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a87100c0c6---84104290056.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb338b6f9f---69114180195.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/8ff86b40f08d122ae2f1c3638568e276/20406069602.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/mexopebajudikowapu.pdfIn PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/97369205988.pdfIn PDF document text
    • http://alexandercdg.com/clients/36029/File/70630332961.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16135f2ab82d4f---12189138661.pdfIn PDF document text
    • http://anvlaw.com/userfiles/file/86013437728.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/19653c943babfeea9f4a81fbcfb8594b/88298560944.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ffbfd91beb---dimowuzugulikatopirodime.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/94f7536b7886e9133a401bf037df5d7c/66821641041.pdfIn PDF document text
    • http://elitk.ru/_files/pomopunarexo.pdfIn PDF document text
    • https://flyags.com/editorResources/file///11366193567.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3140df6d4---7719638573.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4f1543185---kijebogejoloxifituranu.pdfIn PDF document text
    • http://falconfam.com/ckfinder/userfiles/files/95434933241.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608457796f287---76366343447.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_off000103d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D9 21428 bytes
SHA-256: df41d9131a0f356cab50e59d79e41060255ab117925b69ed610461abbf1df063
font_01_sfnt_off0001395a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1395A 10936 bytes
SHA-256: 05ed17faf4cc091a3f30df8e8263f91321ab388d01e18a24551b7c02219cd3b7
font_02_sfnt_off0001526d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1526D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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