Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea99f6a6bc2b8d7e…

MALICIOUS

PDF

101.1 KB Created: 2021-06-20 08:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 5c641136a82dfdea45849c813e79faa4 SHA-1: 2bed1d70cb0780a71f6d5415290882c1e8f78816 SHA-256: ea99f6a6bc2b8d7ea815cd14d6d75645e0cb5a495486815acbf736c0b7b3fb9e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript 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 and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/d8de20fc9fbac719081fd10359e50f71/talalidesixolozoziroti.pdf In PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/12b891b4e9310e6959fbfe2a7c4e67f6/rozemapaderapabigelisid.pdfIn PDF document text
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/jilavujejen.pdfIn PDF document text
    • http://getem.plfiles/file/tafadowanazaledez.pdfIn PDF document text
    • https://fwullong.com/upfiles/editor/files/wonubavapamovud.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d4da9f7e1---94339574104.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba01ae1a036---34479249141.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a89b5906510---43540646479.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/bd1d22caee7cbf068e20fe0368df5c12/93170128660.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/95351252076.pdfIn PDF document text
    • http://cohensevents.com/clients/74638/File/ladokinenubavuvizunux.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/d354a13300da060569f38247e1415860/69325676678.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160736dc5cf6b4---72733715751.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/1598748393.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/0a8ccc05c76cc0f34febebbdd1ddd083/lisuwekinotasamofuvudomup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=worldedit+for+minecraft+pePDF 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12684 4924 bytes
SHA-256: 5291c1e2b6e2a939e0e80c5fe203785342ba7fa28cf989b17ab24e0b40b19368
font_01_sfnt_off00013734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13734 12828 bytes
SHA-256: 325b1d8c58c23dc9c980464eeeefa66b58b72d6ff1c15c0084b1b58411a502db
font_02_sfnt_off00016221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16221 16332 bytes
SHA-256: 69d723212eb6dd1954cef9b4649bd4df6eb17a6f495b2db8137d34beed6776af
font_03_sfnt_off000177be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177BE 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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