Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ff454ed271197e…

MALICIOUS

PDF

81.6 KB Created: 2021-09-08 22:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1746d197cf8bb5e9c48953673b4683d9 SHA-1: 094109ee98f3b0e50fbd729a7baf270e2a4f756f SHA-256: 47ff454ed271197e72293c8829a4bd006cc1ab1c9892f4fb9985e09e9a220b82
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload storage and other unknown domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://bestbelly.org/content/files/files/vemuvedisipemebijubet.pdf In PDF document text
    • http://p-itos.net/admin/userfile/image/file/91014591712.pdfIn PDF document text
    • https://global-product.org/CKEdit/upload/files/90465757557.pdfIn PDF document text
    • https://sainaudit.mn/File/10054111038.pdfIn PDF document text
    • https://gikguamerica.com/userfiles/file/sexufu.pdfIn PDF document text
    • http://www.mamafoundation.cz/ckfinder/userfiles/files/65790025664.pdfIn PDF document text
    • https://autohausnschmidt.de/userfiles/file/69873453671.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/05t24ej9k8hguucdv1ov5uf315/94247545380.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/jurelokukemefidizejijav.pdfIn PDF document text
    • https://viveironativodevicosa.com.br/ckfinder/userfiles/files/18839358256.pdfIn PDF document text
    • http://vertracapital.com/uploads/files/lufowulukob.pdfIn PDF document text
    • http://tko.wavedev.net/img/files/files/kozoworataruxekumamatagag.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/58386248367.pdfIn PDF document text
    • https://www.educationsexuelle-ecole.ch/ck/ckfinder/userfiles/files/vasitakuget.pdfIn PDF document text
    • http://greathorserider.com/ckfinder/userfiles/files/11143244971.pdfIn PDF document text
    • http://hospitalityroyal.com/upload_files/file/logezukinutaj.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/98882941277.pdfIn PDF document text
    • https://jagamimpi.com/contents/files/30214387483.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/58506189916.pdfIn PDF document text
    • https://minlinart.com/archive/upload/files/fisovifetejajeripamudi.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/17505d9a534f5d83257b0080bd17b9e9/96261862742.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/rutizar.pdfIn PDF document text
    • http://wasserentkalkung.at/ckfinder/userfiles/files/26980714903.pdfIn PDF document text
    • https://borgopitti.it/userfiles/file/56018419804.pdfIn PDF document text
    • http://istanbulballoons.com/ckfinder/userfiles/files/34462167393.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613897ec270cb---fomapijolexopavetixenon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=android+change+screen+timeoutPDF 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_off0000da3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3C 17788 bytes
SHA-256: 021509d71752934d66ed46c900870ebde1289b699b4b6aa3feac5e910e96ac06
font_01_sfnt_off0001077d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077D 10852 bytes
SHA-256: 3e131257cb3f0ce5973b10cbde32fdd2456211e7413e29c42f00186e71be8296
font_02_sfnt_off00012035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12035 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1