Malicious PDF — malware analysis report

Static analysis result for SHA-256 e695d1ceb1cc23e3…

MALICIOUS

PDF

123.4 KB Created: 2021-09-08 13:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 8e75a3691e87b49f91c5f142c1469872 SHA-1: 7bf672de0426a368f3b7bf7083990e9971d823f5 SHA-256: e695d1ceb1cc23e39aa91e7cd02b17faa82aed4826145286f5a0b1ced2a62cc7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 0.9919

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crewmak.ru/uplcv?utm_term=divorce+papers+gujarati+pdf+download PDF link annotation
    • http://pekbdt.com/filespath/files/20210904160409.pdfIn PDF document text
    • http://honyi.tw/ckfinder/userfiles/file/kilugenapunobojafi.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/0sv34qgm0g1dbrl53u4c1kloj1/lubomido.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161382aa703ba6---62327836259.pdfIn PDF document text
    • http://modelseafarm.com/kweb/ckfinder/userfiles/files/jagugotedigodofuvigutima.pdfIn PDF document text
    • https://chuyennhakienvangvn.net/upload/files/tiruwemefaruruxovapafusix.pdfIn PDF document text
    • http://adimhukuk.com/resimler/files/deruxukozirov.pdfIn PDF document text
    • https://tahubunting1.com/contents/files/24005951639.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/tadosuvurerevi.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/8d520cfd42396b5a7a4ec186b9c6a852/29103243984.pdfIn PDF document text
    • https://888nv.ru/userfiles/file/sibidatopez.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/14891909848.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/64206760069.pdfIn PDF document text
    • http://hoclaixebinhthuan.com/upload/contentFile/file/5255310851.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137216fa39ba---97201189159.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/21928219643.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161380d9f84e9d---43290169809.pdfIn PDF document text
    • https://marblobaths.ph/app/webroot/img/files/90086011168.pdfIn PDF document text
    • https://www.ebenisterie-burette.com/ckfinder/userfiles/files/21255087372.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/94407964433.pdfIn PDF document text
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/gexofujobuvulib.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/616292652d00254d8ef6bd2de8087bd7/8655833648.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/e0ef607aa046f8ed5e495a84cd3fd2f4/92803355040.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/65320659443.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015da3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DA3 22180 bytes
SHA-256: e73210264765703d94be04e246850577c61644525ec0ed59ff91c1acf9f741c4
font_01_sfnt_off00019715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19715 11176 bytes
SHA-256: fa3ca3db8886d025d325653fba2399e29be3f92c81b362655f35a80dbd8d6b0d
font_02_sfnt_off0001b130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B130 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001c941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C941 16192 bytes
SHA-256: 126aabc53b187bc4421529373f04e2f66a11804dfeaeb35cb650b132d56c1dbd

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