Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d8b195076ba58bf…

MALICIOUS

PDF

90.9 KB Created: 2021-06-28 07:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: d5a399ee9e014fbc1cd027b22786b5a6 SHA-1: 097dc41484bc94ad7de4b9cbd288261ee676240c SHA-256: 1d8b195076ba58bfb763342b9e70570408e9852966b7ff11eeca77252e1570ab
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload directories and other disposable hosting, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the 'Fake invoice / payment lure' heuristic indicate the document's content is designed to trick the user into clicking these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://crewmak.ru/uplcv?utm_term=indian+registration+act+1908+pdf PDF link annotation
    • https://al-farh-iq.com/upload/userfiles/file/pefab.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/50c21e149292874afdea2ac889daa7a8/vogoxujulixezos.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/pisudegafuxoputuxuvebubup.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/josv3bhb4mr4irl2cnkns8ut6f/lozapotewajipel.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb8ef1a7b8---jovurubij.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1606e0bc84990e---84992682191.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/afc381e44d89dd682dc73897b13d3290/86885698356.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/41245290757.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad301f73847---winipomevatolo.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb0340a67b---40611687185.pdfIn PDF document text
    • http://aimic.com/userfiles/file/59906245855.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/628aed95539de46e8473b9c7c2be7cca/17660794040.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d23d057eba---85984969511.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/5c57212d6aeacbd6ff3f62270387e464/77690556580.pdfIn PDF document text
    • http://yildizteknikelektrik.net/resimler/files/vepexusuxuf.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/vowolupu.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/18625286951.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/164e5ccf4259c4edf8b897c5da275b36/506132454.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/13e698ce7b047651179ee788ce2c7695/pafekebeve.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_off0000ffdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDF 16448 bytes
SHA-256: 0111bb40a31ad0471b974e9d5735cbd07aa834bfdfcad0e26e5d5e95c0839e15
font_01_sfnt_off00012a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A9A 11252 bytes
SHA-256: c8f0a7a7ac9bbda43c87cf8c2ec6a2bbba5f9d795ad522f5f39d17bc87e6673e
font_02_sfnt_off000144ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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