Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab0fdcadd62f552…

MALICIOUS

PDF

98.1 KB Created: 2021-07-20 12:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: d2a406b4af951ad5b1709b022fe76cec SHA-1: 2d15cc0c8763d9ed6cbdde32455852389479f591 SHA-256: 3ab0fdcadd62f552acf9c9abf8cb0dc41e4c918e950d9982b32b588d1fb07cfa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9964

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://gaziemirkentkonseyi.com/upload/files/paxezadete.pdf In PDF document text
    • http://daisytalavera.com/userfiles/files/bufokijenolog.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/tadiwetem.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca1a028553---wedawazewubim.pdfIn PDF document text
    • https://renault-service.com/userfiles/xeteze.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/lvnl2qo1cci3jbf6gcajdaod06/xexifetom.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8ddb9ac76---88024423795.pdfIn PDF document text
    • http://cissi.it/userfiles/files/mobubesuwixe.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/jujunu.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/99dc1897a096a5b429bbc84b6ea5e3c8/wafuwafumeluwo.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/79f5d266f5548aec410bb6969ff5a1dc/64411186100.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/ea01b09116d63d9d11965cf32079f2d6/xasowotelutokukurebuva.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/19a5fd346a14701f034bb865786e577d/junol.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/v52urbtgp70pug4cdoh1kp4bh2/fonajusorab.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/krhc3vmu206laf6ckhjackrldm/jorobokarisofeg.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/e9ae2da109d83a49fd27e52e7b84fb02/95377082931.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/lusakejiwob.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099acc26b9a7---8158869159.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/j4v6b78ikmoktr4kg625o6ol0j/rafezaged.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/63209255457.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/f5e9j75dcuq2dk8lcagt0dbom0/47470082949.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=blue+fire+flames+picturesPDF 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_off00011cd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD5 17528 bytes
SHA-256: 34e7e0c4d8b7542908d8b2539231df54e31f8cceb4cdcc370ee79583e8c3a0f3
font_01_sfnt_off00014afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16311 10568 bytes
SHA-256: 92cae74372323b9032e06602351b47cee84971b230614e313507870cfcaa5d77

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