Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5c4d040967c026f…

MALICIOUS

PDF

83.3 KB Created: 2021-09-02 12:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b0e37f025a7f4255ca0a1aadeaf8af21 SHA-1: b13ff05bea899854a0f693fbedd08b85abedf9aa SHA-256: b5c4d040967c026f59a7e05c459c33873dbc5ca7267420bdb2b4f13aa5a6a5ff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to disposable hosting or compromised CMS upload directories, indicating a link farm or phishing lure. 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 embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://irlanc.ru/uplcv?utm_term=solving+square+root+equations+worksheet+key PDF link annotation
    • http://minhtoangalaxyhotel.vn/app/webroot/files/ckfinder/files/lixurugilex.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/ratoxiropafirunopazusux.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/14689722671.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/palazaluwitanaru.pdfIn PDF document text
    • https://dp-silver.com/userfiles/file/92341063701.pdfIn PDF document text
    • http://land89.com/ckupload/files/21558534711.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/bd8jsinjfa2e2se0r84r689gfo/velolajul.pdfIn PDF document text
    • http://www.tempshift.com/app/webroot/files/uploadimagesfile/79932565743.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083dcb8a4394---63382817112.pdfIn PDF document text
    • http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/bazogeporok.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1fc788ad96---24428555178.pdfIn PDF document text
    • http://valeneighbors.com/userimages/44157947026.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce39412b6e---85538037644.pdfIn PDF document text
    • http://softtox.com/new/userfiles/file/mogaranajok.pdfIn PDF document text
    • https://rubenoferro.com/userfiles/file/lakados.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/wapodovogevidixog.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/9c4d3b7a1914f6ba7992f4631489d406/gobirukuraduputiwu.pdfIn PDF document text
    • http://sport-way.ru/img/file/97835065929.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/96568779227.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085017ecdb96---disetajagisunopowukat.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/guzumokowuwubuferip.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160deb685b4202---61526664978.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a7cd143e2---xaxivak.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_off0000dfe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE5 11068 bytes
SHA-256: 95b894c00aed0f105dd0b5b609086e211100d97d0fdb33467a58a8018f495e67
font_01_sfnt_off0000f95f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95F 17900 bytes
SHA-256: 2c01c9964350f2be8f15904510e26ccc466554ae1577a05b977134fe2d2d3961
font_02_sfnt_off00012747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12747 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.