Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fdcd1469c5893c9…

MALICIOUS

PDF

83.6 KB Created: 2021-09-14 10:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 94fed6e9181fead9b7422352fc1a39b1 SHA-1: 9764cc8d56c8210d30800134371474f642777523 SHA-256: 0fdcd1469c5893c99398877f98dd1155cd1db53054421459085f989c599ea079
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, many of which are part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests an attempt to execute malicious code within the user's browser or PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://nirmalapublicschoolerumely.com/userfiles/file/42457347938.pdf In PDF document text
    • https://aecvfcom.nrgence.com/upload/userfiles/files/80715819378.pdfIn PDF document text
    • http://ride-on-earth.com/images/blog/file/93446514605.pdfIn PDF document text
    • http://epmresearch.org/userfiles/files/desudosolarilef.pdfIn PDF document text
    • http://elsped.hu/files/file/mevosovofejex.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/11554955267.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/bazigatuwogidedo.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/kosejeduliz.pdfIn PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/22852666503.pdfIn PDF document text
    • http://tuyothuyluc.vn/webroot/img/files/nugipelapeked.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/tebajena.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/p7451kultb61acbajuluomodtn/vanetenozus.pdfIn PDF document text
    • https://texasbordervolunteers.org/userfiles/file/samekijubazoderimela.pdfIn PDF document text
    • http://aurora-c.jp/files/files/39554701183.pdfIn PDF document text
    • https://drivetripper.com/userfiles2020/files/nesevumezejex.pdfIn PDF document text
    • https://mmszke.hu/files/file/wirejadigafuwujexobil.pdfIn PDF document text
    • http://patroha.hu/file/95379884584.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613281dd67a27---wisugubisejewisir.pdfIn PDF document text
    • http://esllearningbydesign.com/app/webroot/files/file/66363247477.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/35305181489.pdfIn PDF document text
    • http://usairsprings.com/userfiles/file/84023394000.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/tenemagegotokusebiwo.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/bafigerisujuno.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=credit+card+generator+with+money+2019PDF 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_off0000dfab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAB 11296 bytes
SHA-256: cbacfa71a28e86d8c16bc97c22ac20aa57d10a50d8031174e651d3f098f2ac6b
font_01_sfnt_off0000f9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FC 18072 bytes
SHA-256: 7ac675802a8c7b788648419086b16408419fd96a18103ebe31ddec804376434d
font_02_sfnt_off000128d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1