Malicious PDF — malware analysis report

Static analysis result for SHA-256 301d2023e34ea88d…

MALICIOUS

PDF

88.4 KB Created: 2021-07-18 14:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cd914b9182a8e95158539064bc4b20c3 SHA-1: c77508ec22359631446219b134f4774a14a4e8a7 SHA-256: 301d2023e34ea88da7705fd891b24d9aaa726dc3fde0b959a71ab08ebff9206a
156 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which point to compromised WordPress upload directories or are hosted on disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://apsencollege.org/test/fckeditor/file/sedefewibedev.pdf In PDF document text
    • https://jotekonybakterium.hu/userfiles/files/76975225166.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/valowadotimironawugaz.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a57b213d584---simejuvat.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/suwuzujefokaloxakuleka.pdfIn PDF document text
    • https://ccskin.com/geektic/files/86804170158.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160764cd9ced37---5500403825.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/2021610748103713.pdfIn PDF document text
    • http://parcfamilyreunion.com/clients/b/b3/b3ae52aef0329bb57e848b27182677c8/File/bemadadaxawipigizivetatuj.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdfe783a6da---damugudar.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c34f07e499f---katifi.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/xokesoju.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608379d296a09---datiti.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/a34mvo4422un38q7g8c41cqrls/6661932598.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072ba03c9fac---lumenezewel.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb748161ab---69844867191.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f7f69b8a9---mivikotifusopawiz.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ce34c29b7---69646851673.pdfIn PDF document text
    • http://southwest66reunion.com/clients/f/f6/f6f8b7bd17d60304c359e527a2c43449/File/sidepevabugawejategedumo.pdfIn PDF document text
    • http://torgoborud.org/images/file/87707024581.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/e387ceb8e34386ad6065fdfea2f9fb2c/kuwifikekuraxuvodegugiz.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6e5a33175---mogonoxid.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c06a8b58011---debasirasezizogudibuvaja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=trifle+south+africaPDF 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_off0000f64f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E61 17196 bytes
SHA-256: 9cd18010698819e90e3a6129198ae91a7a3407f4cc00e86d8a0e1bb568cf03f2
font_02_sfnt_off00013b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B90 10392 bytes
SHA-256: 9e6dc8ebb998af8bfdf638be9961dac313ddc7da13697cb4d10edc590ba9d89f

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