Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0693b77f7e3649…

MALICIOUS

PDF

92.9 KB Created: 2021-09-20 06:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7b9c488f987e31771cce8b387eb2b487 SHA-1: 97f318d38582f5691d0dd45f132681308f6357ee SHA-256: fa0693b77f7e364998e54485a743194005786ee5aa0a3e80f9f44d3571fb91d2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. While no scripts were extracted, the presence of many embedded URLs suggests an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://www.tcf.gov.tr/ckfinder/userfiles/files/63711630313.pdf In PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146062766575---mejupupo.pdfIn PDF document text
    • http://king-tableware.com/uploads/files/202109171257588269.pdfIn PDF document text
    • https://h1t-url12shio-turbo.com/contents/files/4472989988.pdfIn PDF document text
    • http://1-champagne.com/blog_images/blog_/file/85614739058.pdfIn PDF document text
    • https://campfun.myhost888.com/upload/ckeditor/files/pepaban.pdfIn PDF document text
    • http://ride-on-earth.com/images/blog/file/30026419974.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/18302767098.pdfIn PDF document text
    • https://maintogelonline2.org/contents/files/20065277814.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/dovaxurebunetonezi.pdfIn PDF document text
    • https://hunghiephuylog.com/upload/files/50357358237.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f372308a72---jilabo.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/378937902.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/pixefanoziminejowerazovi.pdfIn PDF document text
    • https://ms2gacor.com/contents/files/67558783665.pdfIn PDF document text
    • https://ixiu-23.com/uploads/files/202109150651081172.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/mijip.pdfIn PDF document text
    • http://alituncer.net/userfiles/file/kemimezebudipu.pdfIn PDF document text
    • http://delve-cr.com/uploads/74297332828.pdfIn PDF document text
    • http://qigong.ru/userfiles/file/55555926366.pdfIn PDF document text
    • http://www.iuoelocal870.com/kaizen/ckfinder/userfiles/files/2776172973.pdfIn PDF document text
    • https://rajatotogroup1.com/contents/files/giwuzivubibujon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=life%27s+too+short+putlockersPDF 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_off000101ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EE 19928 bytes
SHA-256: 9581e3d59adb51b8b27903484f307b38e86797aa7c8a54ad32addd4386c98c38
font_01_sfnt_off0001362b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1362B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E42 10492 bytes
SHA-256: d87c88465cd6d61598fc1e042b51499b9e3daa4f25b7aa07960d9185273ab032

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