Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f2762fb62d105e…

MALICIOUS

PDF

86.1 KB Created: 2021-09-06 04:30:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e73a49df82e31abd738ac59f49d76933 SHA-1: 06ee90b589760e06b6c49be182f5350a68faef55 SHA-256: e1f2762fb62d105e8e52633e042e61662c06a5bc5fd193da6a7c67bc8657ac27
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to potentially compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://uclerbaklava.com/resources/file/48867085973.pdf In PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/bb331f19eabf6b3737eeec641d6f4c48/bixezoxogoxatukav.pdfIn PDF document text
    • http://greenmodels.ru/uploads/files/senewarusufuvavi.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/lozadot.pdfIn PDF document text
    • https://swalaya.in/userfiles/file/simetometufu.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc6fbc245c8---jikezipedujopifomig.pdfIn PDF document text
    • http://kientrucphatloc.com/upload/files/92683170527.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210611_023722.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8bfa16204---92406215986.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/lotozevilasozanibimuxuze.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/71209838262.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b75c5b2d8f---68353088671.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/34270706196.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/wadawowu.pdfIn PDF document text
    • http://caopump.com/admin/userfiles/file/6970246279.pdfIn PDF document text
    • http://alhs1973.com/clients/64426/File/fubowaxolidewofadejubufe.pdfIn PDF document text
    • http://nordicaluminium.ru/userfiles/file/pezolatowu.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/juzoboloxulikoxowapam.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e562ceaa48e---gojimu.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/56693812153.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/mijuxudonowot.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/tipeminewozew.pdfIn PDF document text
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/63907504888.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=les+ensembles+math%C3%A9matiques+pdfPDF 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_off0000e236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE236 21068 bytes
SHA-256: e0aa94d582f94ad7e0080c88c5cad61c8b7dfbf9bdd860b4bf68d15e758ddd58
font_01_sfnt_off00011879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11879 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13090 11040 bytes
SHA-256: d653baabb6341d9bae3d896fd82d9c80529eb6a2119d4ec729273c68ebc7074a