Malicious PDF — malware analysis report

Static analysis result for SHA-256 92be51f84c7d2c26…

MALICIOUS

PDF

73.5 KB Created: 2021-07-22 08:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 492645cdecd155735916635e90305109 SHA-1: d30fe0e205a6fb6348ff7fa992a1261caa0b58a2 SHA-256: 92be51f84c7d2c260a8cd80e37dfbaeeb2e90aedbc2e87dc666c925d971abe3e
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded URIs pointing to compromised WordPress sites and IP addresses, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with exploitation techniques that could lead to client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://meadescafe.com/userfiles/file/tariwekoxewom.pdf In PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d496d7435d---wewilezudemozafekiwu.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/xenurisuwukelo.pdfIn PDF document text
    • http://sammyurias.com/userfiles/files/45118951299.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c96f0df27---kufobikubamase.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/vobodunerewuraxitu.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5f21155ce---21609989487.pdfIn PDF document text
    • https://gulceoyunlar.com/calisma2/files/uploads/55214860335.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/8f14ahtesm6psiq21boj269030/vokapofake.pdfIn PDF document text
    • http://www.gpkoaee.ru/ckfinder/userfiles/files/xalidor.pdfIn PDF document text
    • https://bem-sa.com/img/file/musovogoson.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/49583075064.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0f405b90f---40149319925.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/ruvofuwumobebulet.pdfIn PDF document text
    • http://acquadiqualita.it/ckfinder/userfiles/files/25782321341.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcb7e8e46e---xipademewivodadoduxekox.pdfPDF link annotation
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3ca675b68---paluparolido.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/jogawo.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/ropavigowuwatezat.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608481a8cecbc---ramexenuludezajeniwedit.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/sdqgjm47mpo99ohac3051875qv/fexuxojifofinumazu.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0eb2d8d91---18992930848.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=items+that+start+with+zPDF 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_off0000c0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0A1 16052 bytes
SHA-256: df28a811ca882c6539084bd30607a1fb3c7cf6e20a21dad858ff89ce75026293
font_01_sfnt_off0000ea28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA28 10200 bytes
SHA-256: 1bf7ddf6941478888c637f45ccec7eb034e94ab6af64783d660decf97fc93c11
font_02_sfnt_off0001011d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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