Malicious PDF — malware analysis report

Static analysis result for SHA-256 15845e4c48387822…

MALICIOUS

PDF

85.6 KB Created: 2021-07-21 02:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 95582ab9918aafd19ef4cc6ce1a9de66 SHA-1: e60d34844f8a50b1e706275bf9cd1277df410464 SHA-256: 15845e4c4838782261e393045b55de244c944a88f0b5d07253b0886ecb701b3c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://macautemple.com/userfiles/file/7732715722.pdf In PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082f7137a0e8---fitegowakejemu.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf13fac795---13294467521.pdfIn PDF document text
    • https://gegeny.hu/uploads/file/78493712420.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f201b88795d---vulal.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/6700854650.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/65601412911.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/63516784745.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d20f2ee9d61---zojobi.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lerelosodefikulidubej.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/e70b7cff6ae766f5edf53e989bf43e60/91232860704.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a067205bd42---kamudurumosenomerinijejur.pdfIn PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/visafuromelixuzimojawebil.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/9a7daf5ccf967df93ad606d338c18d70/mubamizivisin.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c16197b4426---poruwisegomovobapigi.pdfIn PDF document text
    • https://ortechindustries.ca/ci/userfiles/files/desudonenefogufemex.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/90246327832.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/7rvgnfophjrjatbssqoijuslm5/52985714899.pdfIn PDF document text
    • http://eurekaloggers1970.com/clients/a/a4/a4917853023b9a70bc4506ca58f09c65/File/54071997198.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/641c7fd687c0ba31dc40a39edcd50689/refazexukoxuzodevofopot.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/41296041071.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/14798034090.pdfIn PDF document text
    • https://kraftyz.in/ckfinder/userfiles/files/22559215186.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=sisters+of+neversPDF 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_off0000ecf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF9 10140 bytes
SHA-256: 25aa1e696d6a591edbf6e85a62887d2a0376f3d35c1f9ef394e23ce5e4d6757c
font_01_sfnt_off000103c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C2 17920 bytes
SHA-256: 0eeddd29f1abc02da66e18e41e0d7a04ed583095cd4f75438ea1cf5fc761ea94
font_02_sfnt_off00013144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13144 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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