Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec95293a6ce7cdd7…

MALICIOUS

PDF

119.1 KB Created: 2021-08-16 10:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ece57e810dc2e9e4f8a04d03876fe867 SHA-1: d873ed85b0a2b9143d75b805753b220b23adef4a SHA-256: ec95293a6ce7cdd7a25cd44338dd37461b987f568cf22fe00f4b1ec3cffbfc8d
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest a phishing or malware distribution intent. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://inwebjor.ru/uplcv?utm_term=is+halo+ce+free+on+pc PDF link annotation
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/oe5e69b7pr0sarj396ei4ku43a/79956745993.pdfIn PDF document text
    • https://beyondpins.com/calisma2/files/uploads/jimivo.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbb44469be---tawodur.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/muxokekuwijiw.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2b027c9a8---tulapam.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/lkm6dhigan9ni7km13dm21vb8c/bodolujikirarak.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d2f8267ef---37682881400.pdfIn PDF document text
    • https://fultoys.com/userfiles/kozudogufogofunexite.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/d7iipguat68gqdj467p6is01o6/99039119207.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/045db6fc54f0d654bf1256abf7d3b971/60813038784.pdfIn PDF document text
    • http://craftland.de/res/wysiwyg/file/wevuwepa.pdfIn PDF document text
    • http://www.victoriousintl.com/new/resource/files/32017675109.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/6580795463.pdfIn PDF document text
    • http://mankatomnclassof71.com/clients/e/e0/e0e8961458839910853a12af65841b27/File/34962450893.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/97046197940.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/27704463dce1ebe0f0a17e0586fda963/25890989336.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/wupuparujimonamega.pdfIn PDF document text
    • http://belloverde.net/emailer/file/razar.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073285a402bc---74567536352.pdfIn PDF document text
    • https://securitydm.com/slicice/file/99923594343.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16089af882863a---69966469482.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/4d42383fc7898af6b753d09464b131b1/70673676352.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_off00017398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17398 10340 bytes
SHA-256: 1b9bdbe349c84d970cbc2841835b936513fca8501f3c5014856594fa5d3d5385
font_01_sfnt_off00018adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18ADB 16696 bytes
SHA-256: 0507b2bc23aafbdcb05a77ae1d51fb9fccc17e5096dd0f6f76fd8ccc687a9213
font_02_sfnt_off0001b622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B622 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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