Malicious PDF — malware analysis report

Static analysis result for SHA-256 e267f5d240016cc8…

MALICIOUS

PDF

69.1 KB Created: 2021-09-25 01:37:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 5471e33640752a7d757817e02c927169 SHA-1: bd20ed61b929a48c817e399cb67e91b94d70e25f SHA-256: e267f5d240016cc8abb53aac3ba82361e83953e77fc51c709811b030cfb1649e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, with high confidence. It contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to potentially malicious websites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a link farm strategy, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://pistant.ru/uplcv?utm_term=class+1+english+grammar+book+pdf+download PDF link annotation
    • http://onelove.cz/file/sirawazubepaj.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139bef575e48---navetoduxem.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/lizoxilopirazadu.pdfIn PDF document text
    • https://www.theoakshealthcare.com/my_content/js/ckfinder/userfiles/files/jumenanogemaxejedutug.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/53314144133.pdfIn PDF document text
    • http://pass38.com/images/contentimages/files/14168191349.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/fezozerazi.pdfIn PDF document text
    • http://quangphong.vn/uploads/image/files/tepokubujilipodivad.pdfIn PDF document text
    • http://deleeuwputten.nl/site/data/ws/files/34249795248.pdfIn PDF document text
    • https://rtaadmin.mrv-educationservices.com/content_file/files/16164310038.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/95291025736.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/36311440300.pdfIn PDF document text
    • https://777mto.net/contents/files/jiziwawemodujepawuwed.pdfIn PDF document text
    • http://turbotechnik24.de/userfiles/file/30064055946.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/gapolexaniwugasew.pdfIn PDF document text
    • http://garage-ys.info/js/upload/files/tinuxopapejumugok.pdfIn PDF document text
    • https://drakbera.com/ckeditor/ckfinder/userfiles/files/74313074928.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/161417a69bcce5---kitapasikoguwumarefag.pdfIn PDF document text
    • http://greece-ex.com/images/blog/file/godasizomid.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1614e4e547b81c---jonivudeta.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/jadodi.pdfIn PDF document text
    • http://nhuahoanglong.com/luutru/files/bidujijemin.pdfIn PDF document text
    • 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_off0000ae17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE17 11248 bytes
SHA-256: 9d1cd6a5cc087413eac819470dc05ee558c36ca59163eb8cc8181ba519c54aea
font_01_sfnt_off0000c7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E0 15552 bytes
SHA-256: 202bc45e16f27d926e5b49888a6892a238469324a5ca847130daa789d2d67006
font_02_sfnt_off0000eee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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