Malicious PDF — malware analysis report

Static analysis result for SHA-256 098b3bd95fa8676e…

MALICIOUS

PDF

74.2 KB Created: 2021-08-10 20:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f466925e1e381ca7eab41806135283fd SHA-1: 1c04f7e75d83aff997ace1b9c753f722f57c074b SHA-256: 098b3bd95fa8676e1d441f6bcb25022e6f3a587f2dc815e9563f6459c17917ea
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous distinct hosts, many of which are compromised WordPress installations or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://exmar.it/foto_fck/file/72317376118.pdf In PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/97d1ed4817f3f6365d2ad0187960d994/52159496406.pdfIn PDF document text
    • http://prinsart.ro/uploads/files/ridule.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/7707623625.pdfIn PDF document text
    • http://aci-immobilier-douai.fr/userfiles/files/bezirerarulijiwuser.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/08/files/210808223519.pdfIn PDF document text
    • https://edmaker.site/wp-content/plugins/super-forms/uploads/php/files/6adf3555b100cecae2eabd9ac2057305/25108754030.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/43625381764.pdfIn PDF document text
    • http://efuturesthai.com/uploads/files/nimofaronupipopirilube.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089cd869ede2---kakoloripibekinanemes.pdfIn PDF document text
    • http://limoride.net/gallery/file/funuwijuw.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160893333ee804---7517422596.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/75156027795.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c50478b9a0---jaxetejedumalekilutoxatuj.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/161109cacf368a---rululamirobebonulifijap.pdfIn PDF document text
    • http://usefchina.com/uploadfile/file///2021080601462497.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607be975889df---62378595746.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/6b4aca2e940445b2f297e8b9b95ea8da/51706076594.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160779b95b3339---bofozexagobeto.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082adacc0ff9---suxokigenagosodu.pdfIn PDF document text
    • http://americansemitruckparts.com/d/files/44410082281.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/kudunenesenib.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/33a0120b547684b822aa3b899441f7e9/15251817937.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=shaiya+ameno+criar+contaminationPDF 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_off0000bfe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FD 10472 bytes
SHA-256: 380c7c6f94228ea0b692d9ba739416c30e0a4876167f9c496157584259a89baa
font_02_sfnt_off0000ef9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9E 16712 bytes
SHA-256: 67268d6333d2e217cb7a758d84d5ec50996d14bd296d148ddd45eb3b03655ba3

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