Malicious PDF — malware analysis report

Static analysis result for SHA-256 02c00bce37cbf8fb…

MALICIOUS

PDF

80.2 KB Created: 2021-09-17 22:33:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e9b88986597706b8315fcfbba420d1de SHA-1: 118c5980eb0c9056807002b6e46fd8343c1661b9 SHA-256: 02c00bce37cbf8fbf611ae9d46ff2b68f324680fc38be925a0dbe21df8c43cbe
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and multiple external URIs, many of which point to link farms hosted on disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 https://chcial.ru/uplcv?utm_term=how+to+scan+qr+code+on+iphone+se PDF link annotation
    • http://hc6999.com/userfiles/files/ziniteg.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d26a26a83b---79619137052.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/kusinawez.pdfIn PDF document text
    • https://igk-lilienthal.de/downloads/gukatof.pdfIn PDF document text
    • https://lmcmanager.com/ckfinder/userfiles/files/pororutebifisigisim.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612eba0161434---91166210959.pdfIn PDF document text
    • https://073741256.com/uploads/files/202109022115117112.pdfIn PDF document text
    • http://newo.ru/files/files/63121381589.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/85693344037.pdfIn PDF document text
    • http://emilybarnes.com/DEVELOPMENT/VERSIONED/emilybarnes/trunk/sites/default/files/file/40054854160.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16134c21c05683---vojitirisa.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/lawikopuvuwaji.pdfIn PDF document text
    • http://tipkeo.com/js/ckfinder/userfiles/files/wemosukopulififimabulon.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/lasalajinunatej.pdfIn PDF document text
    • https://cardolf.ro/files/34560875564.pdfIn PDF document text
    • https://www.willmarshelter.com/ckfinder/userfiles/files/444012189.pdfIn PDF document text
    • https://advik.net/userfiles/file/xojumubeteman.pdfIn PDF document text
    • http://vce34.ru/attachments/file/43560172917.pdfIn PDF document text
    • http://madiagranitosilano.it/userfiles/files/lufuzajawitixadepiso.pdfIn PDF document text
    • http://montazerangroup.com/uploader/file/xexofalatudikaki.pdfIn PDF document text
    • http://goldendazzle.com/upload/quangtri/files/52044785319.pdfIn PDF document text
    • https://alpinashop.bg/files/8246853957.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_off0000d415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD415 10788 bytes
SHA-256: 38cce32dbe8e35c819fc34b13711ba6cd65ab8ed0af73866a8f68b71eec62cfa
font_01_sfnt_off0000ecab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAB 18064 bytes
SHA-256: 9cf956aaf2af81076e8ce48cbfab52bdbdea377127432c7afbf4662e77d6da00
font_02_sfnt_off00011b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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