Malicious PDF — malware analysis report

Static analysis result for SHA-256 264b2d7e4c47c8ea…

MALICIOUS

PDF

75.1 KB Created: 2021-10-04 22:34:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 44aa13a593943b53dbd8f5800efb1eb1 SHA-1: 151bcde275432fe69d4b1035df45ade2bf9ebcc1 SHA-256: 264b2d7e4c47c8ea91059a70d238ea8b704d722a58a19e5fbcc7f5ba8f0722c2
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to various domains, many of which are flagged as disposable hosting, suggesting a link farm or phishing infrastructure. While no scripts were explicitly extracted, the PDF structure and the presence of many external links strongly suggest it's designed to lure users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jaxibimebu.pdf In PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/d55694ed4c4e68350262a8330ffddcbf/57264408525.pdfIn PDF document text
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/73973341456.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/2799305488.pdfIn PDF document text
    • https://bulendengin.com/upload/ckfinder/files/turitasakefiwu.pdfIn PDF document text
    • https://indicaperu.com/userfiles/file/kapoxunopusoxafirikew.pdfIn PDF document text
    • https://cemb.ca/upload/editor/file/xububexu.pdfIn PDF document text
    • http://milkyway-vn.com/upload/files/tuvojudosu.pdfIn PDF document text
    • https://bda.ch/ckfinder/userfiles/files/56717309086.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210908_215204.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/49402263644.pdfIn PDF document text
    • http://bakersfield.thepokeluau.com/uploads/files/bulovuxirenuparovutu.pdfIn PDF document text
    • https://tworaise.com/userfiles/file/sofefadagoxase.pdfIn PDF document text
    • https://harmony-lazienka.pl/Upload/file/20355067868.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/6724737864.pdfIn PDF document text
    • http://autowassenindex.nl/images/uploads/fapajatejomimi.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/ginezizulubadimularikona.pdfIn PDF document text
    • http://bioaec.com/userfiles/files/72089141356.pdfIn PDF document text
    • http://thelifelesson.net/home/tappingchanges/public_html/dowalumniusa/ckfinder/userfiles/files/kunez.pdfIn PDF document text
    • http://les-dvorik.ru/userfiles/file/baxugogotomuxebigonifu.pdfIn PDF document text
    • http://tabletopad.com/images/file/piwesujajomelefosoj.pdfIn PDF document text
    • https://armour-technoz-ca.otzol.net/ckfinder/userfiles/files/44634584480.pdfIn PDF document text
    • http://hoya-system.com/uploads/files/202109050252293316.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=more+and+more+synonymPDF 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_off0000bfcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFCD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DF 18840 bytes
SHA-256: 490ea08e6f8281e25c9a5d3e9e0785f697f8c6cff11f6457d16604a0e5ba09fa
font_02_sfnt_off00010836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10836 10280 bytes
SHA-256: cfd5683e176b82dee3a67f52916b521f6946dba777795400819c25b39bd71579