Malicious PDF — malware analysis report

Static analysis result for SHA-256 e926e6ea2d5bb2fd…

MALICIOUS

PDF

85.3 KB Created: 2021-09-01 22:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ddec1cf327530a074386f1b917fde5f3 SHA-1: 527d9f28fb76b8aba47b2d3bf10c57c88449e0a4 SHA-256: e926e6ea2d5bb2fd83c0d60d99271de854c03758ad40ee69dbcd2699dd6b0770
156 Risk Score

Malware Insights

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

The PDF file contains a large number of links pointing to compromised WordPress sites, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The document body is unreadable due to the file type and content extraction method, but the heuristics and URLs clearly show a pattern of directing users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/b0932158527a45abf69a4ebd082a51e6/daxumirakujowaginezipa.pdf In PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080531b5f688---63054891577.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/g1b1erso2gcf4c2uhu4oi6np6h/gigetuxawizudu.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beebc29f76a---89736034197.pdfIn PDF document text
    • https://mimpishio2bet.com/contents//files/66345663215.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/qk7runeqie5r5vgajhnmg2knt2/83527415289.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607dae7166c81---lewiwejitemivu.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6ba3892f7---logovafe.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/39087764841.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/95350630635.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/dee9iuvpg5qnh0do3v973fe76b/81975589054.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/40463707988.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d33b5f958---satud.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/6ae1d19003194975dacfa6403a83f920/36458747177.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/233d5efa99b0a70387f9e465b74a55c1/zepixisimoxiguzulofub.pdfIn PDF document text
    • http://mertlakustika.cz/images/pages/file/pojazam.pdfIn PDF document text
    • https://le27.fr/docs/file/vufenalokusu.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/11121559223.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608987c3c80ab---90939252279.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160802e7abf239---boruxinazanor.pdfIn PDF document text
    • http://geodez.com/pliki/file/47392035449.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16093c1390ab24---fobuzomemonikurilat.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/161150c8e3158f---36213288580.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=one+two+shoesPDF 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_off0000ebfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001040d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040D 17628 bytes
SHA-256: 00dcd86c230cebbd210a696cc42bc1786f43098e1661d0056a504b9ee1e958a8
font_02_sfnt_off00013170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13170 9916 bytes
SHA-256: 3b1f221b8d15824027b9e7b878bb236aa4b2a6b577b1dbc8418f051c0d6c1d85

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