Malicious PDF — malware analysis report

Static analysis result for SHA-256 b175cb50e5a6c1cb…

MALICIOUS

PDF

74.7 KB Created: 2021-09-20 06:38:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0c4ebc9850b17cb5e03992c94d06128e SHA-1: 8c5d9cebf94dd536318a896ee8e8158e8467b74c SHA-256: b175cb50e5a6c1cb0e4277ffc4ed9b046d2d396434ea4e5b86e351844ef695c4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier with high confidence. It contains embedded JavaScript and numerous external URLs, many of which are hosted on potentially disposable domains, suggesting an attempt to lure users to malicious content or download further stages. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the phishing or malicious content delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://shevian.com/images/file/tufefoduvosuwezimez.pdf In PDF document text
    • http://chromowane.com/userfiles/file/suwogopiperaxovudela.pdfIn PDF document text
    • http://globalfeedindustry.com/upload/files/nusegew.pdfIn PDF document text
    • https://vietnamairlinescorp.org/js/ckfinder/userfiles/files/rimilapavewuk.pdfIn PDF document text
    • https://oferta.lt/i/File/lizojimusoraroku.pdfIn PDF document text
    • https://xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/62442245420.pdfIn PDF document text
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/toviforika.pdfIn PDF document text
    • http://dealershop.es/userfiles/file/gofumiremojopukifusisuluw.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///79350994190.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/lorumepubetifatase.pdfIn PDF document text
    • https://totounited.com/contents/files/darufolupisopisuvolozuzu.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/41602369851.pdfIn PDF document text
    • http://nuovojob.com/userfiles/files/3378735896.pdfIn PDF document text
    • http://cameragiaminh.com/upload/files/34393674545.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/161403a9e6d206---jabifuwoga.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-9/file/82295622756.pdfIn PDF document text
    • https://purevdavaa.mn/uploads/ckfinder/files/73224788009.pdfIn PDF document text
    • http://vncdata.net/app/webroot/uploads/files/37962954663.pdfIn PDF document text
    • http://sarkanyhajo.hu/files/file/vinopinure.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/josazo.pdfIn PDF document text
    • https://coverline.ro/userfiles/file/33934340114.pdfIn PDF document text
    • http://tuvantindat.com/uploads/2021-09-20/images/files/zevakenanipepu.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/43047564368.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=five+letter+words+starting+with+mPDF 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_off0000c1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1A2 10824 bytes
SHA-256: 182fec5e086e9ff56379100d66c2483fba54632af1013472d22abab885aa1b2b
font_01_sfnt_off0000da3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3B 16784 bytes
SHA-256: 00bae9dd4276a75f355bb85734c12cff555bd33a94dba3989c641f6a5b9324f9
font_02_sfnt_off00010565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10565 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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