Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae53a36363b1498…

MALICIOUS

PDF

124.8 KB Created: 2021-07-14 10:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: f3547df363742e1cc38a6d091797846b SHA-1: 1acdea39a339b5e3ad9db3ae720f47cda596dc14 SHA-256: 2ae53a36363b14980e02d31e82465e435487dce7f7b7c3ded7de4a5a2a2bb705
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2cc5a74f4a---ruwipadofaf.pdf In PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaaa80694aa---1057850861.pdfIn PDF document text
    • http://sns.hu/_user/file/zagesazipepud.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f8ee49b79---dawinevopegugidiw.pdfIn PDF document text
    • https://goodline.by/userfiles/file/nilinigaturu.pdfIn PDF document text
    • http://slenderclub.cz/ckfinder/userfiles/files/38504763835.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/9144920814.pdfIn PDF document text
    • http://pspectr.ru/userfiles/file/2498460832.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757abcb7b61---nolozuvabe.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/md95ak9ijrvnuqfk2q4tp35tsb/melewalediloniva.pdfIn PDF document text
    • http://thedreams.cz/files/jogelezikupa.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d085cd0b24d---8827273822.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7bba8a369---57209576350.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/q2s7u2ap7g5jhesht88poafb37/90320746953.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9e11ceca7---47603547138.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/a790g8j2q4af0ktu7ds70ov3b4/ribofokizifejibitukimesan.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771dcba3996---biverobe.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8b42d8f65---23470683302.pdfIn PDF document text
    • http://yuha.be/_files/file/sogudikonajumowa.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/48356056179.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f27f043451---40907068992.pdfIn PDF document text
    • http://oinworkshop.com/clients/6/6d/6d9161a7191ba42f41383a85782e2f4f/File/46384422851.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/fowarakenibivirawipupo.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/xaxiga.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/6d57cbe7ec1fdc43f5e5ab01d88c2823/35012153549.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=venn+diagram+of+federal+and+state+powersPDF link annotation
    • 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_off000186df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186DF 17556 bytes
SHA-256: befdfbb9f19784e813c96c55deeb0338396b5b3caac18f081772067719da1e60
font_01_sfnt_off0001b421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B421 10896 bytes
SHA-256: 27bffbd7902f3f84aee0ff6d555010c965e52c5884958ac0eeb5ee82c0b53a0e
font_02_sfnt_off0001cd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1