Malicious PDF — malware analysis report

Static analysis result for SHA-256 3582d0c72179834d…

MALICIOUS

PDF

82.9 KB Created: 2021-09-15 10:36:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 17a9e3243333620198371e9057c696a9 SHA-1: 8b9f9a9f641752c538ec7276280040ae03dc85cf SHA-256: 3582d0c72179834d38bc69fd32a828dc43fc266e5a53fa6ddce4e2cf7b25c252
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a large number of links pointing to potentially disposable domains, suggesting a link farm designed to distribute malicious content or phishing lures. While no scripts were explicitly extracted, the nature of the heuristics and the embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://abwlondonblvd.com/uploads/files/91960346577.pdf In PDF document text
    • https://akamercedes.com/images/uploads/files/78502539992.pdfIn PDF document text
    • http://sushimura1.com/uploads/files/rujuvikitizezokowojemo.pdfIn PDF document text
    • http://weforyou.it/userfiles/files/69229475074.pdfIn PDF document text
    • https://kaptenhoki.org/contents/files/27092505744.pdfIn PDF document text
    • http://yameitecl.com/ckfinder/userfiles/files/20210909_181009.pdfIn PDF document text
    • http://dpholding.ru/uploads/files/visitekegitoj.pdfIn PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/sabuxa.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614193494a941---77694959602.pdfIn PDF document text
    • http://madonnina.info/userfiles/files/zokok.pdfIn PDF document text
    • http://ecompletecontact.com/ckfinder/userfiles/files/wexos.pdfIn PDF document text
    • https://funbugs.ie/userfiles/file/tuzipazub.pdfIn PDF document text
    • http://epoptavky.com/is/images/FCKeditor/File/60627839445.pdfIn PDF document text
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/91850066250.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/zezezovaludogesixovo.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/rixovogig.pdfIn PDF document text
    • http://atlonnuri.org/UpLoadImage/editer/files/xagiwetitedezovutuvi.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/94279165358.pdfIn PDF document text
    • https://zibarajabi.com/cache/fck_files/file/vevosexomifof.pdfIn PDF document text
    • https://nodka.eu/ckeditor/ckfinder/userfiles/files/satetovatunivikule.pdfIn PDF document text
    • http://termocity.by/pics/files/wipojor.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/bilon.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-9-5/20210905000412640052.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/ehpnmc6tao2me810jh260b7m3m/8237014040.pdfIn PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/70025193034.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=dangal+live+streamingPDF 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_off0000e054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE054 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF866 17652 bytes
SHA-256: 64938aab1945d398876ca56bfeb9898804a7d4e1661ed4de3773c6ac27ca662e
font_02_sfnt_off0001261c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1261C 10400 bytes
SHA-256: a1f9e05add9ead8a20291564aedb0a18726a32d68966a49d76c7e0223e69b2e0