Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e04704e002c4cc7…

MALICIOUS

PDF

72.3 KB Created: 2021-09-13 23:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 857f507b3f8aa7adb2622dbb04ca5538 SHA-1: 12ba50f4a1007fbb217c020029a3e9a00471c5f7 SHA-256: 2e04704e002c4cc7d97ee16ec0c973793d21b39b25bffa81b735f0ef490c11f4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for delivering malicious payloads or redirecting users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely attempts to download and execute a second-stage payload from one of the numerous external URLs found within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://astmasme.com/userData/board/file/nimusadowimaleziligavop.pdf In PDF document text
    • http://labellebeaute.com.hk/ckfinder/userfiles/files/tawesob.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/62546344743.pdfIn PDF document text
    • http://windmill-bv.com/userfiles/files/kegujepov.pdfIn PDF document text
    • http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/monipofufotu.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/b871f0cbccc20003f93c36ad93324e49/bixalosogamotofo.pdfIn PDF document text
    • https://www.le-domaine-de-hauterive.fr/ckfinder/userfiles/files/93056620984.pdfIn PDF document text
    • http://ewhamd.net/upFiles/ckeditor/files/busoxagikubazemi.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/89718650041.pdfIn PDF document text
    • https://stormester.no/files/file/12961532287.pdfIn PDF document text
    • https://kebecelectrique.com/upload/editor/file/35372971646.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/37978103114.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad7f3e5fac---2673204626.pdfIn PDF document text
    • https://nedimgame.net/calisma2/files/uploads/47527067071.pdfIn PDF document text
    • http://baihsad.com/userfiles/files/20210901_190654.pdfIn PDF document text
    • http://studioguagnoni.it/userfiles/files/70651704799.pdfIn PDF document text
    • http://mastervgtour.by/var/upload/file/25603051057.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/diborobufu.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/zutofinosuwaranigazadis.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/26215231816.pdfIn PDF document text
    • http://kietminhrivet.com/upload/files/32251157937.pdfIn PDF document text
    • http://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/bubafer.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=123movies+peaky+blinders+season+2PDF 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_off0000b805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB805 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01C 11116 bytes
SHA-256: 8c5a8d0991dfcfd9b9a41a79c63726c90f587c5ceb0c14661b1bd0c7454d301f
font_02_sfnt_off0000e9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D2 15972 bytes
SHA-256: 90b960c7aaf0ad5340388f57c9ef1b1fb508fa7a391bf83fd35574448b79d008

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