Malicious PDF — malware analysis report

Static analysis result for SHA-256 b551189c20a06ad8…

MALICIOUS

PDF

62.4 KB Created: 2021-09-05 09:09:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: bf133ca096044473b2f93bef2e14a666 SHA-1: a02918ef7671f78cb93dad7fd463223ed111af9f SHA-256: b551189c20a06ad8542b4a05266d7a20d33e66d033e49034e56cfb00b1af19bb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many of which point to compromised WordPress sites, suggesting a phishing or malicious redirection attempt. The ClamAV detection and ML classifier further support its malicious nature. The document body is unreadable, but the heuristics indicate a link farm designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6048

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
  • 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
  • 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://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c5ef93b3b---20768162640.pdf In PDF document text
    • http://richwoods1969.com/clients/861079/File/bidusenoxagaziniru.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b18eb58d18---30579737737.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/8ab86483c48f46505da68857a5951e07/14323033957.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/senujoturoratidawojinox.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16128d9f00366c---ripeluzeseronido.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/tolevulogifa.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ad8f71b6c---77413336758.pdfIn PDF document text
    • http://dzstock.com/Upfiles/file/satotedavajem.pdfIn PDF document text
    • https://vanvoorst.info/uploaded/file/zezagosomixurazabi.pdfIn PDF document text
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/fabuliga.pdfIn PDF document text
    • http://pol2-simf.ru/userfiles/file/gijelumalebojegixoba.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/26603383900.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/goripes.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202106200519449903.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/lubab.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e3723126c---lefiwelovuzewe.pdfIn PDF document text
    • http://worldplastsolution.com/ckfinder/userfiles/files/16669581276.pdfIn PDF document text
    • http://sapaethnic.com/webroot/img/files/63276164271.pdfIn PDF document text
    • http://tsrmvolontari.it/userfiles/files/xebimipaw.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/62178341076.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021053113330659.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/liretibiladudapil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=germs+on+hands+worksheetPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9BE 10592 bytes
SHA-256: 4e5c0544d79df63ab41726651de41934392c8067df52c7eeea7b0bc1c640c611
font_01_sfnt_off0000d1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D4 16016 bytes
SHA-256: 52b40bde64384ed55913dcb5d609df5fcb81ddf15f1d4f551ab03c78dbb411f2

Open this report in the interactive analyzer, or submit your own file for analysis.