Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e7d00fdb9b4f8b…

MALICIOUS

PDF

73.3 KB Created: 2021-09-24 21:01:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 75905f4a5351fb8477d68a7c6787f99a SHA-1: 7d14f85a04b7c134b839dbfe41b1ad07e70ff5c5 SHA-256: c0e7d00fdb9b4f8b8d663d14e893ce7282d28ee1eeb802633664ea60911ed9b1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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=samsung+galaxy+apps+beenden PDF link annotation
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/kc8dh712p0nbpe0s079lfd7j94/lizob.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/51681098283.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16143a1c7397b2---sebabafibumuwekegaroxokaz.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161448f7c36712---katibujuwilelejuzow.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20210912102112145.pdfIn PDF document text
    • https://basundharamart.com/userfiles/file/seridipasizelijife.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///98213454351.pdfIn PDF document text
    • http://ketphatthinh.vn/upload/files/78402937334.pdfIn PDF document text
    • http://www.slenderclub.cz/ckfinder/userfiles/files/kudomatofazobifo.pdfIn PDF document text
    • https://rippa.pt/files/file/41192707133.pdfIn PDF document text
    • https://inprovitvenezuela.com/ckfinder/userfiles/files/74609350470.pdfIn PDF document text
    • https://777mto.com/contents/files/guzekavatamenag.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/gajabirotabitamed.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/74960549543.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/gakofuji.pdfIn PDF document text
    • http://dymenahealthcare.com/upload/fckeditor/file/mesulode.pdfIn PDF document text
    • http://mawarids.org/mpfiles/file/sarit.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/52738934151.pdfIn PDF document text
    • http://www.enjoyvaltellina.it/admin/ckfinder/userfiles/files/24915137251.pdfIn PDF document text
    • http://kimkhimientrung.com/uploads/image/files/nukavegaduxe.pdfIn PDF document text
    • https://bi-kiesabbau.de/cmsimple/images/file/46843754309.pdfIn PDF document text
    • http://designerhouse.ru/upload/files/90265609257.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/ol492reks9qpah9doc05ql7e37/lopul.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130db399f42b---wimokijavunanetema.pdfIn PDF document text
    • https://libertyrealestate.in/ckfinder/userfiles/files/1035068636.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_off0000b7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A7 18100 bytes
SHA-256: 5fd83e5c4aebcb4b86d44c5ac6e477f8dbda6604f36da88695e867abe87b3a3f
font_01_sfnt_off0000e676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE676 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8D 10856 bytes
SHA-256: b488ec5dc9e835f6b451c3b12669b33fe8504f0d2d9dfc40b08acb9ccd543a53

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