Malicious PDF — malware analysis report

Static analysis result for SHA-256 9280fdee815aa094…

MALICIOUS

PDF

74.0 KB Created: 2021-06-05 19:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 93b9fb92e96bd548c3e00419041091d2 SHA-1: e4e2722c16a79b3d0c2d19d6a5f6a14983ac79ff SHA-256: 9280fdee815aa094fc41a401fd67fc335208b86ff96b6a6e237a9381e56ac683
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a phishing lure or download a secondary payload. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://smidgel.ru/uplcv?utm_term=parallel+and+perpendicular+lines+homework+3 PDF link annotation
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/e467498233922f6f2171ca6dd30feed6/34833810056.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/29bf9361338f3b51daf5b6a6dc43cbbb/nudav.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160949e08eb443---zorimevepuxateribexi.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fecb6b3048---60919693129.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/82436420de215e80c058830ab2907106/3707589761.pdfIn PDF document text
    • http://aptchasers.com/FCKeditor/userfiles/file/favesedojodogesesan.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/dc506f4dacffce24ec4ad98c91c552bd/54944682718.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f0384a61d---18993254552.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/53526a471cc1eb94315441921f65246b/dusilovosesutemexi.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2c9b1252f---kekadibab.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ea5c10159---nolul.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/76907222209.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/xijofozelumexeparu.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/7796084347.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb6b8193fe---kotegejopute.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d70b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70B 5636 bytes
SHA-256: 26d56561a0b5d45a885ed5f351beaf37ebc79ef67980328f00e97c7aab116789
font_01_sfnt_off0000ea1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1D 10684 bytes
SHA-256: e6a5b8dd2d1dda11de4e48531a0b41e1251d31787b5ecdf113967efee103fc9f
font_02_sfnt_off00010e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E64 3148 bytes
SHA-256: 50af25a4d223350b8175d9bdb953bbe3b9aa59a4d47f066816304d3cccf8f1b5

Open this report in the interactive analyzer, or submit your own file for analysis.