Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0325552b1b054d3…

MALICIOUS

PDF

87.6 KB Created: 2021-09-13 07:10:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 722fa5e37b69aab8214a163ec7b8e1bc SHA-1: 69e9a6bdd6ca2e0237e99107fa147bc173d7288e SHA-256: b0325552b1b054d3c356126e2f68a60dc9b61387229941316206456fa1b05160
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://mudrberanova.cz/userfiles/file/wojizemivazazakis.pdf In PDF document text
    • https://www.champagne-cornevin.fr/ckfinder/userfiles/files/95203831485.pdfIn PDF document text
    • https://tatvan.in/userfiles/file/vanusiwobepebu.pdfIn PDF document text
    • https://perfecthospital.net/ckfinder/userfiles/files/mavurimob.pdfIn PDF document text
    • http://talesma.com/E/file/jidilusamuxamozajuwapa.pdfIn PDF document text
    • https://cicadit.ro/UserFiles/file/bosepefozodiroliw.pdfIn PDF document text
    • https://rafaela-motores.com/userfiles/file/nijazodakamogomivufa.pdfIn PDF document text
    • http://chipgene.com/image/files/20210905_233452.pdfIn PDF document text
    • http://imaginove.eu/data/Files/59422295528.pdfIn PDF document text
    • http://kzlo.pl/fotki/fotki/file/82082160355.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b3eb9b2de2---11498018581.pdfIn PDF document text
    • https://hippodrome-compiegne.fr/www/uploads/file/vasebebiniwefefutot.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/86347048613.pdfIn PDF document text
    • https://medarbindia.org/ckfinder/userfiles/files/81566182603.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/80757959833.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ecaad534cf---45532242344.pdfIn PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/pedamametasawiz.pdfIn PDF document text
    • https://www.syria-report.com/sites/all/libraries/ckfinder/userfiles/files/kodupujojapazusiwerane.pdfIn PDF document text
    • http://nhatrangpalace.vn/app/webroot/upload/files/moragigafaruwibipadomi.pdfIn PDF document text
    • https://berettyotv.hu/userfiles/files/19150658283.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/dokojosidomabibujoto.pdfIn PDF document text
    • https://prestinieurope.com/userfiles/files/bovutefukufoli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=parler+app+androidPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52F 17412 bytes
SHA-256: d3c07db2223287ecdf59f87233001549dc708d0c116f39d30d0ad04f0b314676
font_01_sfnt_off00012288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12288 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A9F 10120 bytes
SHA-256: a956093e460bed4c971bf6d022fc5c07fdac068749e471d05b3421b3e3c4ba60

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