Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a99293c59c76c87…

MALICIOUS

PDF

78.6 KB Created: 2021-09-07 18:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8d8e1c19741cc7e37528a61608b2d98a SHA-1: f54ee73e0eb2c02ebe4889c3c78833a5ad7f439d SHA-256: 6a99293c59c76c87ccf185922a799de16c334b5075bc703bb0f1950645b51d2c
184 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites, suggesting it is used to distribute further malware or phishing content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://catamma.ru/uplcv?utm_term=druid+spell+cards+5e+pdf PDF link annotation
    • http://codemessaging.net/ckfinder/userfiles/files/52842654484.pdfIn PDF document text
    • https://buonoantonio.it/userfiles/file/21385218646.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e44cce7f3d---kavawugigufizewasuvijigo.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/uumoqkrs1fpcdgq0jvl6ve0jui/zeraxeluxanogulumowifite.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/56836365193.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943c7f8f75e---94712441409.pdfIn PDF document text
    • http://namlongprojects.com/images/uploads/files/77125361004.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160700ab7690f4---97687422331.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0014372001620316563.pdfIn PDF document text
    • http://www.predia.cz/userfiles/file/gorisi.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/dusajepubowomatil.pdfIn PDF document text
    • http://www.emailposte.com/pictures/forunipapuvubatitesilo.pdfIn PDF document text
    • http://investgeorgia.ge/userfiles/file/tutovizekebovuxilokozuw.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/4a923ccf3d7b4804d8e398573cdf5fdc/repudetujumakun.pdfIn PDF document text
    • http://kiapelhrimov.cz/UserFiles/File/65361068070.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609045bb2668b---ronugorezowubimilasugopa.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/161155a0464a15---55658726926.pdfIn PDF document text
    • https://freebcard.com/ckfinder/userfiles/files/80273332497.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/25d16437fe02f42535f28a3485fb154c/pitamazuxaso.pdfIn PDF document text
    • https://novzelandiya.ru/ckfinder/userfiles/files/82265880972.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612c6d1f6fe62---mupamuxo.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa64c974b---jabogiv.pdfPDF link annotation
    • https://yomadesign.com/userfiles/Proj_Name//files/76004832664.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd13c5f70b---dafagosogovanux.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_off0000cc6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE483 10524 bytes
SHA-256: 705ab862e1d280f94a4bdf59d364d7514469a24906f4344738b173e510902883
font_02_sfnt_off0000fc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC93 18624 bytes
SHA-256: 2a6528285cd9f62745b3694b7a5a531c410e3b6179067225e6090617459dfa7a