Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb002700b66828d4…

MALICIOUS

PDF

93.1 KB Created: 2021-09-08 22:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 2bd9491c4c6628f0c715bdc84da5a3a6 SHA-1: 8eda4c3bd0b062e49ca81f2b56264d56918aef0a SHA-256: bb002700b66828d47b7cb0d1689ffa9e9b4a7b35abab9ec57872bf659a8efd97
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9890

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://drafthe.ru/uplcv?utm_term=gt+racing+2+mod+apk PDF link annotation
    • http://sporteambiente.it/ckfinder/userfiles/files/gakegudatogemudipuv.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/45570617063.pdfIn PDF document text
    • https://www.ksmt.edu.np/assets/ckfinder/userfiles/files/20126397234.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/89988199576.pdfIn PDF document text
    • http://xingyeknitting.com/userfiles/files/kudowujurinozujozi.pdfIn PDF document text
    • http://bytip.net/filespath/files/20210908191228.pdfIn PDF document text
    • https://dulsuc.cl/userfiles/file/90179367398.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/30352042198.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/69062693764.pdfIn PDF document text
    • http://locum-system.pl/userfiles/file/77768014590.pdfIn PDF document text
    • http://anpo.vn/upload/files/bazidolulidefu.pdfIn PDF document text
    • https://portofcrotone.com/dati/upload/file/zatir.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/957dcb569b75e0d0a931cbeac146b980/92693195676.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/202195_231222_847.pdfIn PDF document text
    • http://jsushibrea.com/uploads/files/ginubeboxora.pdfIn PDF document text
    • https://mb-classic-service.de/userfiles/file/jusekovilujuxedetisow.pdfIn PDF document text
    • http://sumbulefendiegitimvakfi.com/resimler/files/tavupa.pdfIn PDF document text
    • http://ukrfirework.com/images/file/41234661464.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/latabosatefix.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/a222ef186004bf9864402ec9b964db77/luzivan.pdfIn PDF document text
    • https://nycsmindia.org/ckfinder/userfiles/files/jixupizota.pdfIn PDF document text
    • https://kvzriu.org/images/file/3069603611.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/35173381285.pdfIn PDF document text
    • http://startent.ru/SITE/files/editor/file/putepotugewefiva.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/54831541192.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B9 2108 bytes
SHA-256: 76679793ed5254dcb4152b30069fa5e72a0df8dd19bc139c966f6a28f5744a01
font_01_sfnt_off0000de3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3B 10764 bytes
SHA-256: 69ab28155e9bd81d0b45f55e632d790d54b5e756110ca4b2181c798cbcf1650e
font_02_sfnt_off0000f6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00010eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EED 25372 bytes
SHA-256: b8f11cff4d244e51efb6b20d92cc1c62d1add82c2dda24d743cfe5da7e1cb996
font_04_sfnt_off00014d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D58 16816 bytes
SHA-256: 0c72d86d9bd9485ebe461bda06b43dc9e423f53617afd82f373921c16bb2a3a7