Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e1c9c597ad9d3ea…

MALICIOUS

PDF

87.6 KB Created: 2021-08-19 19:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3cf19d10a739576bad34e9f368090389 SHA-1: 4f2c05de376dbf3a7162174387256d821db75061 SHA-256: 7e1c9c597ad9d3ea52683c0d4e2005226d86163cf116623b8804343bb09f02f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm or phishing lure. The primary purpose appears to be redirecting users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 https://krisoc.ru/uplcv?utm_term=what+is+the+plot+of+biag+ni+lam-ang PDF link annotation
    • https://menlopark.com/wysiwygfiles/file/sukevususimipofegiverelem.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081ab5388299---bipododivosejur.pdfIn PDF document text
    • https://anbuadidravidarmatrimony.com/ckfinder/userfiles/files/nerakefebatuwezokuji.pdfIn PDF document text
    • http://restokrat.info/userfiles/file/palokeziwibilogatajokase.pdfIn PDF document text
    • http://zoop-tech.com/ckfinder/userfiles/files/19090125906.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/7eaacbobmjbhovln129rubmmtn/67374162264.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b47dccc7a16---sizusaraledakoz.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/wevipedemax.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/5b94779f357d3c1629695243fd1de653/rozedi.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/mufuxaxiduwi.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/jasodutofejimobotolivepo.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/kusajujagasuxujorefa.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/23ee20f65ee27f68904c528a623c0557/25653621691.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/4dbb89f736b8bb8179a77a3f627dc0c4/xidixipitewizozifes.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/files/51486035762.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/fba4b936c93f51289b33a8cbda29bfdc/26157675231.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcffd2eb448---69414044236.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b62376deef8---39323468410.pdfIn PDF document text
    • http://alohatoypoodles.com/clients/1/11/1122824db0f83c9e74cf39311881f217/File/48296329342.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/jofepejapenukumagiluv.pdfIn PDF document text
    • http://gruppocinofilomarsalese.com/userfiles/files/91938625783.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/46988943024.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/fe0c5bc95605154d7bcf0ac7e2736f7e/tepalawapen.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/satosorejeneku.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_off0000f22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3D 17476 bytes
SHA-256: 6ed117bd838efbe51de0ba14ad66844fcc05e3d34e75fb9ce319fce5f6c55df8
font_02_sfnt_off000137a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A3 10872 bytes
SHA-256: 0930e2b72506e8f670df9f48cc29f670b51290a8a7f88b7e96d61726b8190653