Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c4ded0bda6b8ba…

MALICIOUS

PDF

94.5 KB Created: 2021-08-05 04:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 32308dd8c87093d66fefd154a3934dcc SHA-1: ccaeb152dda4bc2a400f839228290bba78daefe4 SHA-256: 29c4ded0bda6b8ba271f30cdd2e6258266858e3738abd2fafccc897481402690
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation of PDF vulnerabilities to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 http://eotp.info/sites/default/files/fck/file/11401955670.pdf In PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16087ea867aba3---70940063715.pdfIn PDF document text
    • http://www.heksan.com.pl/file/98666552919.pdfIn PDF document text
    • http://blbr365.com/userfiles/file/1627712109.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/tukede.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a277e4620---gopizodowugivatomigu.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608833466b39a---22935171181.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/84986837898.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/4846020316.pdfIn PDF document text
    • https://petrovsky14.ru/docs/files/xezifabav.pdfIn PDF document text
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/29667229213.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f1300da5fdc---naxovalokaj.pdfIn PDF document text
    • http://npi-management.org/ressource/site-image/files/8314469127.pdfIn PDF document text
    • http://gibisch.com/files/files/76397464242.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/zajekarisixonazix.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bf683ca6116---25357772975.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ca498d3f8---furodenewusudalikagaxeto.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/ruluwofipegavip.pdfIn PDF document text
    • https://kasihpaham.com/contents//files/82633985185.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=vw+sharan+dimensions+2019PDF 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_off00010a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A76 18468 bytes
SHA-256: afb4f3ffb260cbc0d0f3936cf9256d8b8b1b795bfde197f4067adcf93e5b9705
font_01_sfnt_off000138fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138FE 10888 bytes
SHA-256: 8ec22f89f98c9d5582f58e7eda3d29a4107c2410690c2b24c5e865f56de8c97e
font_02_sfnt_off00015216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15216 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1