Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e0baf1acc46b4fe…

MALICIOUS

PDF

54.0 KB Created: 2021-09-25 12:08:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7cb4c42d052e544569ccaa056e5ea9f0 SHA-1: 8af9e6fb63962607d64d846f29ca0b3750cfd1cb SHA-256: 6e0baf1acc46b4fe28e478e2621cc7c000549b371bccf68ced9d02ecdda4dc1f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan and by an ML classifier. It contains a large number of embedded URLs, many of which point to disposable domains, suggesting a link farm or phishing campaign. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a strategy to obscure the true malicious intent through numerous redirects and low-reputation hosts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8205

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://archism.ru/uplcv?utm_term=gravity+falls+season+1+download PDF link annotation
    • https://angkorphotographyguide.com/userfiles/file/90134704103.pdfIn PDF document text
    • http://cheapstandard.com/uploads/files/tiwemefobodejadawe.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/31628485140.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/gejulikalozikole.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/38875057593.pdfIn PDF document text
    • https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/28476761679.pdfIn PDF document text
    • http://bharatandcompany.in/ckfinder/userfiles/files/25521043610.pdfIn PDF document text
    • https://art-eria.pl/mandarynka/pliki/files/61767672596.pdfIn PDF document text
    • http://kayapalinakliyat.com/file/poweluxax.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/zugadezopev.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///zoxosojamuwidagamolife.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/rhkr09bb1vqn084k79n2afm0jv/bezujed.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/26650552025.pdfIn PDF document text
    • https://needletherapy.eu/upload/file/puxadababo.pdfIn PDF document text
    • http://nexxstep.nl/userfiles/file/pegavavazolopaxogi.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16132796f65aee---dukagelivoj.pdfIn PDF document text
    • https://keralatemples.info/ckfinder/userfiles/files/lakilum.pdfIn PDF document text
    • http://carszana.com/image/upload/File/voxilol.pdfIn PDF document text
    • http://sireny.net/share/files/271954085.pdfIn PDF document text
    • http://topup-fight.com/ckfinder/userfiles/files/rezaloge.pdfIn PDF document text
    • http://bk-plus.at/userfiles/files/kixifozabep.pdfIn PDF document text
    • http://teleinwestor.pl/userfiles/file/99697812124.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/69838597278.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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