Malicious PDF — malware analysis report

Static analysis result for SHA-256 84252cae7d00a47b…

MALICIOUS

PDF

89.8 KB Created: 2021-07-02 22:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5974d64493192d89e8a854c222022ce3 SHA-1: 82758b4585a5bcd2df86e21eb115bc620c1e64cb SHA-256: 84252cae7d00a47bf987b350106081997793431d068660d9e4b3370cce1a3469
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The file's structure and embedded links indicate it is likely used as a lure to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://abnicum.com/files/file/58697141077.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081474a63dd2---13839849654.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a309081ee---16361077723.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/dakajugunopuponilamasedu.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f35739f73b---90196333148.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/3537fab0fb400df1562c1e1722395f81/xorowefafitipo.pdfIn PDF document text
    • http://chromoink.com/updates/file/boxogoxines.pdfIn PDF document text
    • https://nevisnews.com/userfiles/47393583689.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6452ad646f---48273977628.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/b029e2202a9a271da660687f1419c157/dejupetibodogemodakugoji.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/seganatumizufazatiboj.pdfIn PDF document text
    • https://eternalbliss.net/file/84292911733.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608d71c83b900---gokapusuwenafixexuxil.pdfIn PDF document text
    • https://dildendilecevirievi.com/upload/ckfinder/files/98244444709.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609411bb91090---20625161453.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/sawuwexomexa.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/34503086716.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/lurixixabexenijeder.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829fada098e---domeposokevagurozaz.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/tasusalovubosebopigusufet.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/vowipebejeda.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021060708382083.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b960c1b4cb6---pigolazalumanufulusu.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608601c713d38---60605467627.pdfPDF link annotation
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=the+hunter+call+of+the+wild+all+animalsPDF 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_off0000f41f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C31 19516 bytes
SHA-256: fded1eb3fd5edda2167a34e12ba1be0fc46e4eefc379ad21b4b00a1bf0c1e823
font_02_sfnt_off00013f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F25 10888 bytes
SHA-256: 3e60f3f46c161e564508c677538c0a9f8b6d605d09d7e7d37fe47517d118f31d

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