Malicious PDF — malware analysis report

Static analysis result for SHA-256 064f120d891df556…

MALICIOUS

PDF

96.5 KB Created: 2021-07-25 14:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 33db4d3f8dab2aa93d0402e97cad2ee1 SHA-1: aad1352a69aef378f5c4a3514d7e2a6888b028aa SHA-256: 064f120d891df556f537dba225e242bc2ce6d2754dea4a833573b29da09d53dd
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV and ML classifiers strongly indicate this PDF is malicious, likely a phishing or malware distribution lure. The presence of multiple unknown URLs suggests a broad campaign targeting users through various compromised hosts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • 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.
  • 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://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/7a3o0hrmr09qh1gpe893u01ba1/guxizizejaba.pdf In PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/7836fec7de3e57071b151472dac4240d/dodajeridotibot.pdfIn PDF document text
    • http://smartcevent.com/clients/871459/File/xatopik.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/bafud.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/e9f45ad29c0eaca32ee4b4d82f4bf088/rabakogi.pdfIn PDF document text
    • http://terhautz.com/upload_files/files/41346211780.pdfIn PDF document text
    • http://classtool.info/upload/files/61018577352.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7b3e7856a---suzaduza.pdfIn PDF document text
    • https://aquamedicasatumare.ro/ckfinder/userfiles/files/53538241438.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/6ce3e789d45b020c1be5d3b02895d9a9/nasomat.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/76055039692.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16073cc13c340a---kofadegokujuli.pdfIn PDF document text
    • http://alltechsro.cz/files/55466253875.pdfIn PDF document text
    • https://thepainter.asia/upload/files/86921035864.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/rapekejadaf.pdfIn PDF document text
    • http://newo.ru/files/files/zugapotaxij.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c663916a57---fotadima.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16073a120e7f5f---fazadax.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/59436661895.pdfIn PDF document text
    • https://subarini.ro/mm/file/welirurewepufula.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e25737cca---duwumulivurema.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=robinair+34700+owners+manualPDF 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_off00011380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11380 18068 bytes
SHA-256: b929ea2e5249740d04170baaa312019cec6991b027a569bdf1d247a267131551
font_01_sfnt_off00014320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14320 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B37 10964 bytes
SHA-256: 4a20ecf659677616a456723b39005af4b563523647289d90c9754de20c35460b

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