Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d009447baeb1542…

MALICIOUS

PDF

89.0 KB Created: 2021-07-30 09:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 118f3b6e65a0650ee7b66c7e049c4a37 SHA-1: 29acdc78175283b6602b380fa01d6747d708db72 SHA-256: 2d009447baeb1542f4df10c8171328fb118ffff949922cd2cf6e8ec8ababa2e9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, many of which are hosted on disposable domains or use SEO manipulation tactics. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common method to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://catamma.ru/uplcv?utm_term=mount+and+blade+warband+crack+download PDF link annotation
    • http://pushgroup.lv/userfiles/files/wevakenomasexolalovuduv.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/1f2673c8a5e7cabf3476ae5876815b0b/wozizisaxasesabe.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/712defd67cce71c221b2cab16aa34989/7801209858.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/0dca1f1ecdcf74e4967af8d0d89201b2/24977596260.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/9qdp3rm1n4b0ujqarrje91nj6t/728986754.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/3aq9tvf29loe3fu8vqrdr1356s/56222851319.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e976a3927---wijedeniwudazobuvapi.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/keketebilojogulilurev.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/ba312127bf59a76b3b679047d4f8d822/31605969245.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ae69a4a77---50827438804.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7fecc3148---xuborupoge.pdfIn PDF document text
    • https://thegioibaobicarton.com/Images_upload/files/gekakubafopusopelu.pdfIn PDF document text
    • http://gesht.ru/admin/ckfinder/userfiles/files/divekolog.pdfIn PDF document text
    • https://mmszke.hu/files/file/bawoxozegata.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c116018c57b---vodigadefabugis.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/zaterebawipodutisezoxuzu.pdfIn PDF document text
    • https://saleskerala.com/ckfinder/userfiles/files/42742975086.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021063014313673499.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16073f628d12c7---31237841503.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abb26533ec5---35713496092.pdfIn PDF document text
    • http://anipetkingdom.com/webroot/img/files/bivitiwesujuvufeson.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/79455680103.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/0a182114adf6d6e2fa15f3ddf91c9498/jekikonanulakomaremudoxu.pdfIn PDF document text
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/16515842559.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_off0000f5df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DF 19548 bytes
SHA-256: 5e81112ec86106583e5e95756b02a7f8b3817a841c371d3b896fcfea725ca41d
font_01_sfnt_off000125cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125CD 10516 bytes
SHA-256: feda92548bdb805c26a0f6802e5b1a571828a41a48fc3eb13ddc0c3d88798ba6
font_02_sfnt_off00013df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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