Malicious PDF — malware analysis report

Static analysis result for SHA-256 7070595d480a0e46…

MALICIOUS

PDF

122.3 KB Created: 2021-09-06 22:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 53e46b801a831de6ea1aa8a3f2ed688b SHA-1: 16d63eccb66818acd347d230b3fd00856dec5d42 SHA-256: 7070595d480a0e460cb9f87e171385e179372b8c47defa8a53fe51862fb185f4
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://philabc.ru/uplcv?utm_term=johnson+and+johnson+annual+report+pdf PDF link annotation
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/kd4rvranarj46sh6vpbgqk2db0/xefixeguvobigolilo.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/46ddee5f7ad215b06a9cd2c3f666635a/35359632741.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021080205535780554.pdfIn PDF document text
    • http://oasis-inwaste.asia/files/file/nilazawajejifalexopur.pdfIn PDF document text
    • http://xn----7sbbbizu2bxaod.xn--p1ai/userfiles/file/terupi.pdfIn PDF document text
    • http://www.mariabeckmann.com/fotos/uploads/files/lobezewodolevefesif.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16110ba998114b---32347287397.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/75739502860.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16128ed891e1da---50552445774.pdfIn PDF document text
    • https://medarbindia.org/ckfinder/userfiles/files/kepajipepawinipokegojupe.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/fab295dc8c539bc631e901ecfe63263f/lizik.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/jc3gthed316hrlakik6dhvktd2/81021581420.pdfIn PDF document text
    • https://lacecinella.com/writable/public/userfiles/file/28982162132.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/nebatanepokel.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/67023881949.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/31922c4e7ec8bd4696e8339a337fe567/49288520962.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/bti87hsqbc2b1e6sds9jdcacq4/kidotubuxededajatenozalur.pdfIn PDF document text
    • https://grnca.org/img/files/files/69947957804.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/uqrs9ivep1n7br8vbsarjknj21/1955372426.pdfIn PDF document text
    • https://siahotel.com/userfiles/files/10675261657.pdfIn PDF document text
    • http://giftboxvietthuy.com/upload/ck/files/tafozojurokiruropeferes.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/3a0eb20e123f748c2511d662e0ebf4c5/buziranaduxagobiki.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/140a72961c366a494499c0b6d13038dc/98259035783.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_off0001782c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1782C 10724 bytes
SHA-256: 5ae758cc2cebef753960d735b4cfc37187292c557c6cd9b9b3a0124fd8be1a23
font_01_sfnt_off000190c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190C8 19448 bytes
SHA-256: be9aadd554b8b4e5178c3ff446faca1ed3b69b1b51691839e26aede4c441b33c
font_02_sfnt_off0001c366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C366 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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