Malicious PDF — malware analysis report

Static analysis result for SHA-256 9729a5186646e5b0…

MALICIOUS

PDF

79.4 KB Created: 2021-06-06 11:35:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a82ddf8977362e5e3a6e522b14b16e64 SHA-1: 2aeadc6819517311be339f9ab610f38bb0469de9 SHA-256: 9729a5186646e5b053d0c2ddbab20b7ea757f30ece3f1b86111517efad288b42
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://laborke.ru/uplcv?utm_term=construction+business+proposal+template+pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/ejvs1bj13lqdpvhijrl0ktkmet/28715187948.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160b0760488ab1---fesikolofojurupuzepularax.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/583aa0cf30eeae36a49fd82dfa3437f1/80289996718.pdf
    • http://alexanderkanevskyartgallery.com/clientMedia/file/32891921612.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948d361f5f1---58950071102.pdf
    • http://bajajsports.com/userfiles/file/daxetefogazixesafe.pdf
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/50a08c9cb2717919f206169c541b1708/pefafunomadizu.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/0a3a8e7a13cf0a2d33a499cc60b70d63/sulatebadaken.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0806c73b4---lejelaxebibetuxa.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/a1dd8b376f21a0d8e008f56691fe6c45/32041929624.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/031aca20c2b21ad20917632e559ff48d/78307237787.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f182c4b5cf---45802325235.pdf
    • http://altaprecision.com/userfiles/file/fimofonuserogipiz.pdf
    • http://english-life.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160705d8bc57f8---53552806552.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/a9a28c4d1f38770745c2e4323b45f182/48649733693.pdf
    • https://alakharia.com/public_html/userfiles/file/fixepalegofezofomuvid.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fab5.bin
48b39cbadf6950023ff205b410c8e7dfa8bc1e2201207b14b31b7a4b3c19bc63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB5 5344 bytes
font_01_sfnt_off00010cc3.bin
043a8614a0c0dcb230984cb906a84e168df40ca9135bf9e704713714185291bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC3 10484 bytes

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