Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eae7dd6281e3311…

MALICIOUS

PDF

151.9 KB Created: 2021-09-23 21:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 783bfe443dd736ff9b2ef505c9dbd4e5 SHA-1: e9f3554399c5bf062f269a8851314593919cf1d0 SHA-256: 2eae7dd6281e3311247b67dda699cdf12343a46b584084bc1c59f4a9d02be76b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicative of a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://catamma.ru/uplcv?utm_term=foucault+theory+in+early+childhood PDF link annotation
    • http://qdjshg.com/files/file/28641400345.pdfIn PDF document text
    • http://medizator.ru/ckfinder/userfiles/files/64904915865.pdfIn PDF document text
    • https://bushregenerators.com/userfiles/files/lomaduletufiguwiwunep.pdfIn PDF document text
    • http://aotwresort.org/ckfinder/userfiles/files/91356317210.pdfIn PDF document text
    • http://phaptangpgvn.net/app/webroot/upload/files/84651555991.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/razugaputeseso.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/nudarexepogitu.pdfIn PDF document text
    • https://jxlmedu.com/file/files/20210902_075045.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16137831f4acb3---31012762943.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/tefakepip.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebd88a2870---98780976994.pdfIn PDF document text
    • http://sakra.sk/storage/file/lewusa.pdfIn PDF document text
    • https://www.aukuras.org/ckfinder/userfiles/files/76009180513.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/powesoxosozozugetoxinapuv.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/161425406cc355---vadutopadividexezomot.pdfIn PDF document text
    • http://serramentisiciliano.it/userfiles/files/37009872121.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/51907401529.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/14552733064.pdfIn PDF document text
    • http://bkmarine.net/ckfinder/userfiles/files/1631538553.pdfIn PDF document text
    • http://ssatripoli.org/userfiles/file/91405092137.pdfIn PDF document text
    • https://ozsersogutma.com/upload/files/matitirodogunabipagevo.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/46262447523.pdfIn PDF document text
    • http://burattinojatek.hu/userfiles/file/20660600174.pdfIn PDF document text
    • http://businessvaluationapp.com/fck_files/file/pubufopu.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/xakanad.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_off0001e7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E7D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001ffe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FFE6 22092 bytes
SHA-256: 9b3dd818c7d05e2529210b484204cf5777a98bf80f927dc1bf87472da88e5157
font_02_sfnt_off000239b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x239B4 10492 bytes
SHA-256: 3f5182c8d122fe05afabd100f723756a4797521f085214bc3c18bfb97fe70840