Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e82d3bb8b5bdcce…

MALICIOUS

PDF

122.4 KB Created: 2021-08-16 13:14:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 1e47f68dd8ef3721247918f7994df33d SHA-1: b4040c193bccf601e10cf7156cfc1290b4d6862b SHA-256: 5e82d3bb8b5bdccea4bfb200c6d15849d179b9de390452db38932da39a910d80
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or redirection to malicious content. The document body is unreadable, but the presence of a link farm on compromised infrastructure is a strong indicator of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9746

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://itracmediav5.com/ckfinder/userfiles/files/94116719744.pdf In PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/2b9922996e2149ff309b17ca5f192efe/54684626838.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/7988062174.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/xiluvikiderivozize.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8648b3876---18420421320.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd5447a4c34---96461483940.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/96559026809.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b80762c83ad---kutigubatikowejozavimibaj.pdfIn PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/32980715634.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/200218401289.pdfIn PDF document text
    • https://24emk.ru/ckfinder/userfiles/files/31926239346.pdfIn PDF document text
    • https://alpinashop.bg/files/gulesujajikumukobuxovif.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160842d43985c4---45411966631.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/c81b4239757c7a9d367df9c4981a5cde/gawufunisipovu.pdfIn PDF document text
    • https://ecohort.com/userfiles/files/lixemopowoponurezodom.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/49034201114.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a06bc08bf5d---sitofugerilatiborewone.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607100f5017b2---gamenogafuwujofaxe.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/41382097794.pdfIn PDF document text
    • http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/24406711658.pdfIn PDF document text
    • http://unioncentralreunion.com/clients/3/3a/3acd25563584ef55397927d4124196c4/File/60184964637.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6896e87ee---98886279132.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/5fcc1538b601a81efb7c98a2ba8d6f41/pedoxezugojifixawapaxo.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/ef2ff2c52d2c3749bca96c0a01681b5e/vukinipip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=apeman+mini+dash+cam+1080p+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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A39 22104 bytes
SHA-256: e5bf3d6ece69e0caba28aa7c844d2103ffe76adcc3a941f487dd6063ecd811a8
font_01_sfnt_off000160f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160F8 16852 bytes
SHA-256: 8d4b00eccbc8b76726633cea269d0ae84bf57d778b4ed7cc11b8600406923ce1
font_02_sfnt_off0001792f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1792F 10924 bytes
SHA-256: 46723f2f29eda1a8d966fae0301ae441168dafdad4f88049e73a9f406f8ca301
font_03_sfnt_off00019242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19242 15836 bytes
SHA-256: 23f0b0ef013d64ab7535bf0c91e438432eac4a87d632d8aedd206d516c4a86c4
font_04_sfnt_off0001c2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C2BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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