Malicious PDF — malware analysis report

Static analysis result for SHA-256 014d9fff1b39e509…

MALICIOUS

PDF

70.2 KB Created: 2021-09-18 23:21:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7cb99ddbb6b5b5579f9a2ba664b53ea4 SHA-1: 7d49b62c4e21836356412e709fddf0370c79dba3 SHA-256: 014d9fff1b39e509cc946aa134edaec72e5be10db063bbd87245ddb21fe7cade
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the PDF acts as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The presence of embedded URLs and the PDF structure suggest it's designed to facilitate phishing or malware distribution by redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://inwebjor.ru/uplcv?utm_term=gordon%27s+11+functional+health+patterns PDF link annotation
    • https://printsolutions.ro/uploads/wysiwyg/files/79990598885.pdfIn PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/50187505878.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/693925472.pdfIn PDF document text
    • http://alptw.com/images/files/gatolaruzokepuxad.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/gevuduxokililobo.pdfIn PDF document text
    • https://adamant54.ru/userfiles/files/peretakulosasa.pdfIn PDF document text
    • https://expomediainc.com/upload/file/41214837799.pdfIn PDF document text
    • https://peiitw.com/Upload/ckeditor/files/8856932111.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b962ad1c3b---rinupilib.pdfIn PDF document text
    • https://digicpictures.com/downloads/dedisixodosebefefumilewo.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/fapejadopadarutomibazavu.pdfIn PDF document text
    • http://fields-on-earth.com/images/blog/file/guregowotebusalotojesare.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/ntedpjku0ijhjfrgdr1nq23q30/xiwibiguz.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/40004565829.pdfIn PDF document text
    • http://e-restauracion.com/app/webroot/files/uploads/files/34665790438.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140531ab1ec5---8406606476.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/22992377513.pdfIn PDF document text
    • http://vuoncotichdep.com/upload/files/vifevulazilifomon.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/60986960566.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/39884709911.pdfIn PDF document text
    • http://taiwan-tsai.com/upload/files/36510154823.pdfIn PDF document text
    • http://bwemfjhjk.friend-match.com/upload/files/65574499486.pdfIn PDF document text
    • https://purevdavaa.mn/uploads/ckfinder/files/3017335036.pdfIn PDF document text
    • https://aodaixuan.vn/app/webroot/upload/image/files/73254810705.pdfIn PDF document text
    • http://vattuxaydunghl.com/userfiles/file/ritoduzenoriwufajewok.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2ED 15364 bytes
SHA-256: 8d369e0b9dd4ff2c57da964f9bd7b320a6c59577cd4a4f09d946739cabac0533
font_01_sfnt_off0000d9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E5 10944 bytes
SHA-256: 18bd9d4c69a38757fb3af81ae4a02b781440a302c538db772cf9b3ec2ecee35a
font_02_sfnt_off0000f34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1