Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f51d53043d7f633…

MALICIOUS

PDF

84.8 KB Created: 2021-09-12 00:16:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: ababe96622b6710ab1c48304fa5e465c SHA-1: 4dcca2da7fb99a935b0feadea60da5ae54e4ee6e SHA-256: 6f51d53043d7f63399607f6be25e1f8d497b06b7525211eac44c3fa89a90cab3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to external URLs, as suggested by the PDF_URI heuristic, which are often used for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 http://matstravel.ru/userfiles/file/37711626971.pdf In PDF document text
    • http://dydlhx.com/upfiles/file///dobomal.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae54b62a86---70089344529.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/vonali.pdfIn PDF document text
    • http://tk-weld.com/images/library/File/wevesajotejinopowekefoji.pdfIn PDF document text
    • https://xpress2.eu/ckfinder/userfiles/files/22830985697.pdfIn PDF document text
    • http://everbeenmagnet.com/js/upfiles/files/69641124543.pdfIn PDF document text
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/12870237574.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/fesixopelesobajiv.pdfIn PDF document text
    • http://qataminational.com/uploaded_files/userfiles/files/petagabunopaba.pdfIn PDF document text
    • https://auto826.vnpec.xyz/uploads/files/joxepuli.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/vibenul.pdfIn PDF document text
    • http://apismorava.eu/docs/77820299409.pdfIn PDF document text
    • https://brincandoeaprendendo.com/fotosempresa/files/57524585057.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613826d88961d---52756605017.pdfIn PDF document text
    • https://olterus.com/contents/files/81976390938.pdfIn PDF document text
    • http://infosierra.es/images/editor/nunoveginifofewufixe.pdfIn PDF document text
    • http://theponghop.com/upload/files/71066808384.pdfIn PDF document text
    • https://galerieportelouise.be/userfiles/files/49061414210.pdfIn PDF document text
    • https://pastijptoto.com/contents/files/juguweraxatofevadunejur.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/mepavalilabesixubebozavu.pdfIn PDF document text
    • http://korvet-sp.ru/userfiles/file/36962071752.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=run+hide+fight+stream+onlinePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE493 18432 bytes
SHA-256: dd7d24ec6b394433f0c89d9b00c9a3b31ed8c9401b1272cfd8296bb27ae1bc5b
font_01_sfnt_off0001144f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144F 10948 bytes
SHA-256: 915fd238b38fab0aacbacfdc42b6e0e2a153872a1dad13aaa76aee69abea5869
font_02_sfnt_off00012d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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