Malicious PDF — malware analysis report

Static analysis result for SHA-256 76bac517bc9fa62d…

MALICIOUS

PDF

141.5 KB Created: 2021-06-24 06:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9275e50a21296f0e5af397cc3501ff9d SHA-1: 8e7f53f81a256274129bc4d4149b7c507e330173 SHA-256: 76bac517bc9fa62d0c9333767036d9e5c488c028d01788d63925921a4abf4250
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://chcial.ru/uplcv?utm_term=panasonic+sdr+57+manual PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608461b2294e8---kenojoguwojujonefebad.pdfIn PDF document text
    • https://lifesmart.ro/ckfinder/userfiles/files/fisidapavo.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160961c1be9e7f---gukuwibebuwoza.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c2e4b5399---98812767008.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/96827536803.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad80b7d4a3b---21577742010.pdfIn PDF document text
    • https://yukkumpulgroup1.com/contents//files/12158105477.pdfIn PDF document text
    • https://altbuket.ru/files/rexojuwisanalopezalekute.pdfIn PDF document text
    • https://arnetbilgisayar.com/upload/ckfinder/files/63527272154.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/67816560285.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160890bb7462d3---zezetesedudi.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160933d9ce9abf---tenazaxodaxer.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/bofetabokukapakajexol.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609200c3e0855---nojigukexewurepejujixete.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/kurewezajaripefiso.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/sc8h2jjojt38n1o3i5jj2d0ned/6256032249.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/ip7fsme7mt0fd3k02appi1i3dv/47143999722.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C7C4 2916 bytes
SHA-256: c0b2ac107a0c4dc40efcf057cbb9b88218f5a1f4a2611aff69a4b3d1ecef2469
font_01_sfnt_off0001d224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D224 5288 bytes
SHA-256: 5c915a1cc85e31c607bd5fd2954dba397ca39128450c1c15f22fca8c5dcf0401
font_02_sfnt_off0001e413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E413 14512 bytes
SHA-256: 30f980b586e205ead4bb18af6f5c5af151048020655846cdc7240a44c94aa7c7
font_03_sfnt_off000211ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x211BA 16204 bytes
SHA-256: 31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf

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