Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c5e0fa988dff27d…

MALICIOUS

PDF

70.5 KB Created: 2021-10-01 21:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 1eed928a6cefc138c159431533dd5f41 SHA-1: 94c5cc81207314f1391dadb5694eb7c6b99201db SHA-256: 8c5e0fa988dff27d3a313490c18915c213d8890983eaa5fc28a134568c306fb6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://laborke.ru/uplcv?utm_term=90+day+fianc%C3%A9+the+other+way+putlockers PDF link annotation
    • https://ropaalmayoreo.com/images/userfiles/file/sitemewilasu.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16153807856ee6---30878692345.pdfIn PDF document text
    • https://marblobathware.ph/app/webroot/img/files/zolibijopu.pdfIn PDF document text
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/13403997888.pdfIn PDF document text
    • https://juraganmonyet.com/contents/files/35242393013.pdfIn PDF document text
    • https://portugaliaimagyarok.com/ckfinder/userfiles/files/83637283937.pdfIn PDF document text
    • https://visualarchive.bg/files/75274116180.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/sokukavabizivukojobox.pdfIn PDF document text
    • http://naphotelbangkok.com/userfiles/files/puwewubadu.pdfIn PDF document text
    • http://unsersohn.com/images/file/levorujaduk.pdfIn PDF document text
    • https://3drm.bg/uploads/pictures/files/54271852399.pdfIn PDF document text
    • http://gk-eventus.ru/admin/ckfinder/userfiles/files/67672078280.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16136b2fb89ecc---28162376146.pdfIn PDF document text
    • https://parisnordmedical.fr/docs/file/63509194274.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-9-17/20210917210524949886.pdfIn PDF document text
    • https://nk-sostanj.si/files/file/virowigapekisi.pdfIn PDF document text
    • http://shopphutungmayphat.com/upload/img/files/87099665650.pdfIn PDF document text
    • http://thriftstorewebsites.net/flash/thriftstorewebsites.net/file/guperamaxowotanobinisuzi.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/5021765849.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/6360571305.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/xazivitivususewapok.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/51518020389.pdfIn PDF document text
    • http://chargooshads.com/images/upload/files/31430904547.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_off0000aeb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6CC 11456 bytes
SHA-256: 2a90c918a94959d9da8dfd1eb4fb1ff75ffa6ce35d859b0e01b24420ef6186a5
font_02_sfnt_off0000e18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18E 16184 bytes
SHA-256: 52d1214d69cd86d74d42d95cc0d6127eca24c3a2bad91b500be1f4342cb993af

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