Malicious PDF — malware analysis report

Static analysis result for SHA-256 c038f5433b13edb2…

MALICIOUS

PDF

80.0 KB Created: 2021-09-03 00:30:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bd81d9b53f94ce5e261d526b667d90f2 SHA-1: 824be198ff7f0b6a14f2d1a9330e3a415e426776 SHA-256: c038f5433b13edb282d8ab385e3477930d94cee27a4173566d3387c5d37e9d97
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that point to compromised websites and link farms, a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/c30f828f8d4ae9cf51d071ad5d980c29/zawepalotiparerit.pdf In PDF document text
    • https://lescourailleurs.com/upload/editor/file/4837874737.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/sotivane.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/73671973665.pdfIn PDF document text
    • http://rosniyom.com/userfiles/files/kivedawujizeniv.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/74904534818.pdfIn PDF document text
    • https://krusomying.com/data/file/7182598495.pdfIn PDF document text
    • https://festacontinua.it/public/file/31623708478.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/b3202a5ac0bca23de0b684e5461f529e/6256517739.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/2424bf7980a938e2d1b23967f22a2289/tudowaxuwugap.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/7cd9558b4c11244555d65489f49bd60e/96648019968.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/jrj8spqcgtm4l3ahn1hj883fbb/69115349241.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/p1b9b4tq8l40odcmcpmuij3viq/xiligogakonexepawanix.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/walegazo.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc4f620aee---zojisinaromemupalab.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb3930a419e---17082936513.pdfIn PDF document text
    • https://gsm.company/ckfinder/userfiles/files/rakopufepodolagotuniro.pdfIn PDF document text
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lafefodibakono.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c1536dc193a---71084862104.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/veliguravamuzevuwusek.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/dafb8e781d2555dae815ecf184ffe0a6/90984485372.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/4440e13d4c90fe598d1286b494bd5772/nejeva.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/92171605804.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=italian+adverbs+list+pdfPDF 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_off0000d306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD306 18136 bytes
SHA-256: 9fd7af90376347bdea1b431d00a6b56ee4c4cb0d9c2c7d5d3c6777b4ecd8449d
font_01_sfnt_off00010267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10267 10528 bytes
SHA-256: 4576825cccf114607b3b5464701ece54ade2c35df4de6f20cee723c28c5e78af
font_02_sfnt_off00011a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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