Malicious PDF — malware analysis report

Static analysis result for SHA-256 1132c73f1a166045…

MALICIOUS

PDF

97.1 KB Created: 2021-09-12 06:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 84cab8075e211f289f3a1d559c9fbf32 SHA-1: 11018135234a4e3713acdfc3dfab87d71340051f SHA-256: 1132c73f1a166045bf2475e1661ba93064f6aa8896f593e7633aa294d236fb3f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous embedded URLs pointing to various domains, many of which are likely part of a link farm designed to redirect users to malicious content. The presence of external URIs and the link farm heuristic strongly suggest an attempt to direct users to potentially harmful websites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://infrive.ru/uplcv?utm_term=helix+waltz+apk PDF link annotation
    • https://www.cylinder96.ru/admin/ckfinder/userfiles/files/fazupagesesebosew.pdfIn PDF document text
    • http://candemdientu.com/Images_upload/files/fotiditusona.pdfIn PDF document text
    • https://073741256.com/uploads/files/202109072047104349.pdfIn PDF document text
    • http://samtekelektrik.com/files/51609471442.pdfIn PDF document text
    • https://proxus.nl/file/98291130880.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/27228633500.pdfIn PDF document text
    • http://lidaoxc.com/upload/files/danibisijawivimanoz.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/wazevajokolonusobex.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/57273397623.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7095a833a---62976517154.pdfIn PDF document text
    • http://babijie.com/upload_fck/file/2021-9-7/20210907151611168997.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/nifuwimogubotojo.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210904061339.pdfIn PDF document text
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/wofamapukezifavon.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210908212337.pdfIn PDF document text
    • http://alphamarino.kz/images/news/file/5533242275.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/lofuf.pdfIn PDF document text
    • http://nexxstep.nl/userfiles/file/wexetanotejurolupofodiwi.pdfIn PDF document text
    • http://tuivaivietnam.com/uploads/files/monujodasewurekodinasufap.pdfIn PDF document text
    • http://maketmaster.ru/admin/ckfinder/userfiles/files/78940239088.pdfIn PDF document text
    • https://lapakunited.com/contents/files/29355546203.pdfIn PDF document text
    • http://gaytonfa.com/upload/files/bokulamugokixasuma.pdfIn PDF document text
    • https://vietnamwelder.vn/uploads/news_file/33762627589.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0F 16148 bytes
SHA-256: 1c024217ce21bb66922f73502146d3c7616b47413e2e194c36dd680b30e64e78
font_02_sfnt_off0001219c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219C 10084 bytes
SHA-256: 833b81fec137cfc0afda37712695875617ea42d1728d4b8c036acdbcb20419e2
font_03_sfnt_off0001383b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1383B 24948 bytes
SHA-256: 4f26e7e38ca560aa83bb0f635830c46f6930b92710413a414370247a82604428

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