Malicious PDF — malware analysis report

Static analysis result for SHA-256 67a1f0a0f3b8b743…

MALICIOUS

PDF

86.7 KB Created: 2021-09-09 09:29:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 391f6cd0111a8d80cc96f8585a851852 SHA-1: cace3510f7106709019525990e12838a7ecfde8e SHA-256: 67a1f0a0f3b8b743cc577b5e849f516e1601a703fc8c8bafa309b54bf5de0b4a
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document was flagged by multiple heuristics, including ML classification and ClamAV, as malicious. The 'SE_MFA_LURE' heuristic indicates it's designed to harvest credentials or abuse multi-factor authentication. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's intended to redirect users to phishing sites. The presence of numerous links, many pointing to potentially disposable domains, reinforces this phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://manuale.aziendasulweb.it/userfiles/files/bubinamukudiwitujuxefoja.pdf In PDF document text
    • https://cmottaviproductive.it/uploads/file/71680297861.pdfIn PDF document text
    • http://chithanhplastics.com/uploads/userfiles/file/37555956177.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/21214731905.pdfIn PDF document text
    • http://norilsk.torbay.ru/images/uploads/file/jakovevivo.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613299fe3b8f4---jifoselupiwufugeruvare.pdfIn PDF document text
    • http://naphotelbangkok.com/userfiles/files/63906844939.pdfIn PDF document text
    • http://laulumaja.fi/ckfinder/userfiles/files/rukuwapulevukuvisuvir.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/lofiwodakijogat.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/81467672461.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/jilixadonedexax.pdfIn PDF document text
    • http://berbun.com/user_img/file/finewaro.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/49868110206.pdfIn PDF document text
    • http://hflbdq.com/uploads/file/080223063131.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/xewokufizudev.pdfIn PDF document text
    • https://mgs-on-track.com/uploads/misc/files/pisizelo.pdfIn PDF document text
    • https://dintek.eu/uploads/file/67837168092.pdfIn PDF document text
    • http://centrons.com/uploaded/file/30622707861343a4384679.pdfIn PDF document text
    • https://podiummagazinenews.com/ckfinder/userfiles/files/fawuposotogefazadiboxo.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/161395ff56cf52---morij.pdfIn PDF document text
    • http://maybomnuocdanang.com/uploads/image/files/lavadakakepakewajeg.pdfIn PDF document text
    • http://associatedreclaimed.reclaimedoils.com/userfiles/files/bigodibogededitu.pdfIn PDF document text
    • https://immo-macedo.lu/userfiles/files/taxegofulinapuwenatetiza.pdfIn PDF document text
    • http://www.w.radeton.cz/ckfinder/userfiles/files/defabunexetejineke.pdfIn PDF document text
    • https://doublehair.center/upload/ckfinder/files/97930389977.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=apple+vs+android+presentationPDF 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_off0000eee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE7 17616 bytes
SHA-256: 82c45ea8a541c05fd23c3f2a8086ee3b90411b81f88716ead8e50389dca24d6f
font_01_sfnt_off00011cf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF1 10432 bytes
SHA-256: 78e1aa762dae0af1d0417d357c97e6c21f0c0a46a1072cfbf5175c7f0264cf03
font_02_sfnt_off000134c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1