Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47e693496b0749a…

MALICIOUS

PDF

71.6 KB Created: 2021-09-12 18:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: aefda23ba8052a5581fd41ebfb23e751 SHA-1: caa591041526692b889bf58959257257cc545e8e SHA-256: e47e693496b0749a9510ac8fa83bd9fa6dc4715aeaf432499dd59c624c93d943
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript points to T1059.007, and the overall nature of the document suggests it was delivered as a spearphishing attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crysiq.ru/uplcv?utm_term=the+l+word+123 PDF link annotation
    • https://atiksigorta.com/files/fodotepivuwogetuwa.pdfIn PDF document text
    • http://fittbikese.hu/files/file/zopiradademezexunokufigov.pdfIn PDF document text
    • https://kristaldicarlo.com/userfiles/file/81690746134.pdfIn PDF document text
    • http://mayepnuocmia.vn/data/ckfinder/files/74095109838.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161368b931058d---tufolifutuvidapif.pdfIn PDF document text
    • http://cu-mbc.com/ckfinder/userfiles/files/buwazulug.pdfIn PDF document text
    • https://www.hemingway.bg/app/templates/js/ckfinder/userfiles/files/lapotawukedawejakumalo.pdfIn PDF document text
    • https://bunian-co.com/other_files/File/zoparapofigirugu.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/49920318299.pdfIn PDF document text
    • http://pc580.cn/upload_fck/file/2021-9-8/20210908120217700253.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/66190757748.pdfIn PDF document text
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/fafodewonotegu.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/87451018854.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/sobixi.pdfIn PDF document text
    • http://zulassungsdienst4you.de/bilder/file/rinomusixowiz.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/farotufulekip.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/sekozagaxafezukaxuwowato.pdfIn PDF document text
    • http://h-p-n.fr/catalogue_dynamique/file/sobewisolo.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613586eb524bc---90061287807.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/lokojeg.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/11213781052.pdfIn PDF document text
    • http://damosushipleasanthill.com/uploads/files/nemudokojemo.pdfIn PDF document text
    • http://belv.ru/userfiles/file/zojatoju.pdfIn PDF document text
    • http://montpellier-businessplan.eu/mbp/upload/images/images/upload/ckfinder/jimakofezubigisudivu.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_off0000b7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7BA 16412 bytes
SHA-256: 10dec10e9dda919d41a7c5adb61bbe09f3a9498f4b0c322c2b1f22b6fe98ad6b
font_01_sfnt_off0000e1cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CB 10112 bytes
SHA-256: 189befc17246eb4af62da5bb43a63f192acd500c250da041fc8e962770b549ca
font_02_sfnt_off0000f8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1