Malicious PDF — malware analysis report

Static analysis result for SHA-256 7069723616c310f9…

MALICIOUS

PDF

101.9 KB Created: 2021-09-18 09:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f22e73dd09b5f249a3de8f11f6ff3033 SHA-1: ee1b4b34b47913f22ce4a18da6846a95c64091eb SHA-256: 7069723616c310f946e52cad63fbab46ab1cbc0eb680b0ca3c208504d30479ec
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for delivering malicious content or redirecting users to malicious sites. Heuristics indicate the presence of a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to distribute further payloads or phishing content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://bouwbedrijfbouwheer.nl/userfiles/file/39955754693.pdf In PDF document text
    • http://cathugo-yachts.de/res/wysiwyg/file/18299624491.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/cefed94b6c3ff79840c33eab3deac47a/zanudumudap.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/90296564552.pdfIn PDF document text
    • https://noble-program.site/js/ckfinder/userfiles/files/luviwol.pdfIn PDF document text
    • http://www.vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/kawiwazeguviw.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/161443a41ca49d---faxazepexidix.pdfIn PDF document text
    • https://poganyvolgyi.hu/userfiles/file/5333219943.pdfIn PDF document text
    • http://orlickachata.cz/files/files/fabarone.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/58571096169.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/molevusenupivan.pdfIn PDF document text
    • https://cdmsig1.com/ckfinder/userfiles/files/49765179056.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/3806831345.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/dagejawonafizij.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/16136236478.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/78802234810.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/vipezifenusot.pdfIn PDF document text
    • http://slmj8.com/data/userfiles/files/96905302312.pdfIn PDF document text
    • http://cukiernia.eu/upload/files/lojipos.pdfIn PDF document text
    • http://bdn10.cz/files/file/62047450427.pdfIn PDF document text
    • https://e-casainteligenta.ro/userfiles/file/sogamorazupujedeluwa.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613203a41d647---sawabo.pdfIn PDF document text
    • http://gmart-express.com/demo/uploadpic/file/65938693640.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/sipojewinuxisarukunawuba.pdfIn PDF document text
    • http://upasamed.org/Content/uploads/files/69875768425.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=watch+captain+america+winter+soldier+online+free+putlockerPDF 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_off00012405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12405 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013c1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C1C 11156 bytes
SHA-256: 669c7a20c4cbd36c9a589cdd21044021a97c56582b05a0ac5bbc7141371d5f56
font_02_sfnt_off0001560d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1560D 19712 bytes
SHA-256: 1b737f0050393d02501f8aed938d1cb7e63dddbce21fbdf3662946dc6cbe213a

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