Malicious PDF — malware analysis report

Static analysis result for SHA-256 d044876a4504d52c…

MALICIOUS

PDF

70.0 KB Created: 2021-09-27 06:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 60f69b91d39d66f2bb15f4216483f3e7 SHA-1: 00c2bfa54b9e64d77c27cda97604d05b13cfa035 SHA-256: d044876a4504d52cbc6063fd742743a46a0a7def03289a52247c6f569c84c6f6
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The sample also exhibits characteristics of a link farm, with numerous URLs pointing to disposable hosting, suggesting an attempt to obscure the ultimate destination or distribute payloads. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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://www.sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/neranarigalegogagasapaxe.pdf In PDF document text
    • http://ruben.pl/ckfinder/userfiles/files/jilafuxodagefol.pdfIn PDF document text
    • http://peetersinstallatietechniek.nl/upload/files/41837243422.pdfIn PDF document text
    • http://studiosaletta.it/userfiles/files/gopekawavotujuz.pdfIn PDF document text
    • https://www.hosotte.com/ckfinder/userfiles/files/49735647476.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/dabevaf.pdfIn PDF document text
    • http://nhasachconggiao.com/luutru/files/24761997204.pdfIn PDF document text
    • https://shidoremicrosys.com/media/23358463658.pdfIn PDF document text
    • http://potlista.com/file/files/13166509495.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/97529719039.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/2021921052137504.pdfIn PDF document text
    • https://estudiowebcolombia.com/ckfinder/userfiles/files/fipoja.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161413f11c2e67---78375720451.pdfIn PDF document text
    • http://abnicum.ru/files/file/93299602417.pdfIn PDF document text
    • http://farmaciacogliate.it/userfiles/files/nepunopanujelugasepuvabox.pdfIn PDF document text
    • https://enilubricant.hoakhanh.vn/uploads/image/files/65969787428.pdfIn PDF document text
    • http://biomehl.com/images/content/files/moxokemita.pdfIn PDF document text
    • https://harshahometutors.com/uniformkontakt/userfiles/image/files/12567113192.pdfIn PDF document text
    • http://sieuthihatgiong.vn/webroot/img/files/61271976112.pdfIn PDF document text
    • https://at2-turbo-j3t.com/contents/files/29639308682.pdfIn PDF document text
    • https://mytopics.it/uploads/file/30197399052.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/98315965105.pdfIn PDF document text
    • https://technoarc.net/userfiles/file/rujunorovukoboz.pdfIn PDF document text
    • http://thehedgerowchronicles.com/ckfinder/userfiles/files/42381065310.pdfIn PDF document text
    • http://2sisaccount.com/userfiles/files/novarasago.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=manikarnika+the+queen+of+jhansi+onlinePDF link annotation
    • 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_off0000b2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cabb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCABB 10772 bytes
SHA-256: 4a187eb2c13103073d6366ee50a0c2b588f1a06636721f0a498d5f9293c0e212
font_02_sfnt_off0000e36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36C 14704 bytes
SHA-256: 460e14c9cf8eb12726d741e7d34cede6897ffe7deddc756837195e91c50fc75b