Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c29f5ce3830309…

MALICIOUS

PDF

68.2 KB Created: 2021-09-24 18:28:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 40d2e3605c4982846165f4febfb2b3b0 SHA-1: 2486b862e3419291da0ddaa0630552ff9d24aa40 SHA-256: c2c29f5ce3830309abe4941094a6cf20bf5e0c050e6f061adba4dd1beac5d813
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many of which point to potentially disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download additional malicious content. The presence of embedded JavaScript (T1059.007) is a key indicator of malicious functionality within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://vzwsportenmuziek.com/content_docs/fuzudaluxigikoma.pdf In PDF document text
    • http://attilacenter.org/userfiles/file/29917615009.pdfIn PDF document text
    • http://henghuitong.com/jingkelun/userfiles/files/20210903162657.pdfIn PDF document text
    • http://metrominicabs.com/survey/userfiles/files/63610729409.pdfIn PDF document text
    • http://hkalc.com/userfiles/gisajopibozamarexejipomu.pdfIn PDF document text
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/30285344526.pdfIn PDF document text
    • https://sportnazona.bg/f/uploads/files/lapomuxepe.pdfIn PDF document text
    • http://alles-vom-schreiner.de/userfiles/file/dumemitowuzokok.pdfIn PDF document text
    • https://estudiowebcolombia.com/ckfinder/userfiles/files/wowajovax.pdfIn PDF document text
    • https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/49942312559.pdfIn PDF document text
    • http://duz-drustvo.si/uporabnik/file/lisabarivigikaxevejevesik.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/jodejolulobexawowud.pdfIn PDF document text
    • https://procogs.com/FCKeditor/file/46550285762.pdfIn PDF document text
    • https://knoxvilleremembers.com/media/xorebedudaj.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/tosirinuwovefe.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/94471727135.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/79198207501.pdfIn PDF document text
    • https://zenithoverseas.com/assets/userfiles/files/64858937774.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/47083107889.pdfIn PDF document text
    • http://hengtongrongshang.com/jingkelun/userfiles/files/20210923165200.pdfIn PDF document text
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/gosunarogixatinaguzegovo.pdfIn PDF document text
    • https://esprimagroup.com/userfiles/file/vejatudumixegufijumovum.pdfIn PDF document text
    • http://tanabuauto.com/js/upload/files/lumevudavujo.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/zipijogi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=led+pel+price+in+pakistanPDF 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_off0000af54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC76B 10436 bytes
SHA-256: 96d7e5b5c1a8f333d2aebdffb4774e70e05758978a5703f14ad99cf81d2738ae
font_02_sfnt_off0000df28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF28 14468 bytes
SHA-256: 3774f1d4b20372224296a9b01df5badb692c818fce970e85a1a4ab7284ca9e11