Malicious PDF — malware analysis report

Static analysis result for SHA-256 d747b6545703f503…

MALICIOUS

PDF

93.5 KB Created: 2021-09-01 23:38:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8ea7bd80f4cfb5a28a6433812e6659cd SHA-1: 63a3f741b0f8afb98a7ff88ffd7ab835dcc0180e SHA-256: d747b6545703f503b4852fcd29ee22415e1e4ea434229437ce15e50981a08962
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. No scripts were extracted from this sample, but the presence of numerous external URIs indicates a strong likelihood of directing users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://oniceh.ru/uplcv?utm_term=elizabeth+the+first+of+england PDF link annotation
    • http://volamtuyetthe.com/userfiles/file/lejisijusadapijufenarise.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bded3a4e9ca---91351446496.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160712a6c13137---kunir.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210625055218.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fdcf74834b---32307168179.pdfIn PDF document text
    • https://arnetbilgisayar.com/upload/ckfinder/files/dapaburemugetitujonag.pdfIn PDF document text
    • http://bangkokmagnetwire.com/ecodev_test/image_system/files/21718049011.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/20369694454.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/0kismt8tl9n2ad3ehs7vcr1ih0/21013169554.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/71418730305.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086762d46bb4---60644835443.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/8408bbc304b2f20e996ee5808fa7ffcf/72139470426.pdfIn PDF document text
    • http://yuemeism.com/uploadfiles/files/4728441835.pdfIn PDF document text
    • http://thangmayedex.com/webroot/img/files/zawosoxebedoxe.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074434b2e023---89058758603.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/78860279414.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/45962660658.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ead0c8dfb7---sigemufefazaxibowisiw.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/44649800560.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/binove.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/fuvukukukeregikiduzo.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/46a75834903871666b14a8ccc544619a/zilamix.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001066a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E81 10816 bytes
SHA-256: b0ec4f3357d18e6d68e23dd7b69ba5d1120605f2bd3284231ca6691edf9566cf
font_02_sfnt_off00013729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13729 19084 bytes
SHA-256: deb7a669924860e0e116c42aaae54d14a2f2319e89dd3b796bbdab0d6d91eb3e

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