Malicious PDF — malware analysis report

Static analysis result for SHA-256 46847ba4c3ff9bcf…

MALICIOUS

PDF

99.6 KB Created: 2021-06-25 15:08:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 149634801524d1a01a7c63ddd523c384 SHA-1: ad05c83a8f1d24c1cf144eaf2ace0f431a87360c SHA-256: 46847ba4c3ff9bcfef316f628845b9d09e602469a260a22471f66cdb523e5818
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs and link farms pointing to compromised WordPress upload storage and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://infrive.ru/uplcv?utm_term=one+piece+strong+world+subbed
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160975f21180d6---81062095379.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/de98a55b5ed4ac62190bace91d32ee2a/6336951305.pdf
    • http://bilmatbasim.com/userfiles/file/kifozavazadiw.pdf
    • http://voszveszprem.hu/_user/file/zaleguxetozekutalabevune.pdf
    • http://alexanderjamesbackcatalogue.com/userfiles/file/zifosenakedusuri.pdf
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/sodepidinug.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092a5dc02fe1---tanonunebalar.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921ee696ecc---62262889402.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d3c96f2f8---wivugunavopenasuz.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160759d1248b45---52128991800.pdf
    • http://galettedesrois.hu/userfiles/file/kiseranokaz.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d26dc3fb5---buxixufijoku.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1599eb70d---norarareziduzenuwolored.pdf
    • http://bearings-home.com/userfiles/file/71699985191.pdf
    • https://grup-insaat.com/userfiles/file/fexolovenifewego.pdf
    • https://maxflowfans.com/userfiles/file/19435358905.pdf
    • http://jtour.vn/userfiles/file/lujiwikubokirajikugebasos.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116d8.bin
735e2ad3b6f1b8d2fd57d53a7ef3a57101d898f358bcd2112ae2b7f6eaa5eba7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116D8 18656 bytes
font_01_sfnt_off0001481e.bin
9cfc14d05bc0ea5752009a074e0e00cc6a3c4af0d39c0e775e54c99106f5476d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1481E 1712 bytes
font_02_sfnt_off0001503e.bin
f486265196a48caa509d95b296a00d293bccb48f0deccd9f8cf4c46743c19415		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1503E 10880 bytes
font_03_sfnt_off00016927.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16927 16792 bytes

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