Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd5354ab66e17b4f…

MALICIOUS

PDF

70.6 KB Created: 2021-09-22 10:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 98f1b723e0dead9c40384c49e362d33c SHA-1: 599e88c95e91b04c7389bcb5f6fc9f479c727189 SHA-256: fd5354ab66e17b4ff09b5a19ba49c1c37a7f21fcd468c19ee26c820ab3fc6136
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs pointing to external PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The presence of external URIs and the overall structure point towards an attempt to direct users to malicious content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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://hotelbasantresidency.com/uploads/jafijeluguzos.pdf In PDF document text
    • http://shiokuda1.com/contents/files/96270143009.pdfIn PDF document text
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/dawunanasojamizad.pdfIn PDF document text
    • https://actorconseil.com/files/file/tavuzatosogibofudumaj.pdfIn PDF document text
    • http://equipociclistaugeraga.com/ciclistas/userfiles/file/31108451909.pdfIn PDF document text
    • http://laskod.hu/userfiles/file/nivixoziluzim.pdfIn PDF document text
    • http://sangiorgioautoservizi.com/userfiles/files/82314577269.pdfIn PDF document text
    • http://sweet-sugar.de/images/uploadedimages/file/lanekoku.pdfIn PDF document text
    • http://highspiritsmusic.com/ckfinder/userfiles/files/80917150830.pdfIn PDF document text
    • http://pnalog.ru/images/file/22636904458.pdfIn PDF document text
    • https://www.rougeindigo.com/ckfinder/userfiles/files/15006263144.pdfIn PDF document text
    • http://ventima.ru/userfiles/file/59215443176.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/48806255643.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/0a4bdf38e362bab44e3fdd457a6e98c5/jexanizularakerubosovif.pdfIn PDF document text
    • http://sxnqx.org/upload/file/Fl202109200603556984.pdfIn PDF document text
    • https://lyna-garage.com/htdocs/cljr/data/files/92261664165.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/gasivuf.pdfIn PDF document text
    • http://azco.friend-match.com/upload/files/54594014587.pdfIn PDF document text
    • https://probidjp.com/ckfinder/userfiles/files/20210901_094716.pdfIn PDF document text
    • https://narellesastro.com/userfiles/files/gubabidunitusobejobopel.pdfIn PDF document text
    • https://www.medicalbi.com/ckfinder/userfiles/files/64592306976.pdfIn PDF document text
    • https://fetogram.com/images/upload/files/detomisi.pdfIn PDF document text
    • https://sevenhillsgroup.net/ckfinder/userfiles/files/pavimeritovidivezowusofa.pdfIn PDF document text
    • https://adesso-moosburg.de/images/file/zofaperakedi.pdfIn PDF document text
    • http://salkim.com/userfiles/file/33262032448.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+get+my+photos+back+after+factory+resetPDF 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_off0000b6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEBE 14320 bytes
SHA-256: e2f18d71dc57671b888928dea8195bda545d5ff501a6342b23835134f896cc54
font_02_sfnt_off0000f25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25B 11108 bytes
SHA-256: 3e17979137f30026c24794428d286f688689914807d8f89f07a49d020b8cf3d8

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