Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b2cede8e2a8504…

MALICIOUS

PDF

80.1 KB Created: 2021-09-15 18:24:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 49594461b0826888daa97103f362e2e9 SHA-1: 8a1718908f120637087c06aa10abe4dca0b33498 SHA-256: 06b2cede8e2a85049c40ce27cb8fe1cf3d663325fac101a7baca6d5a1fcc53c0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating malicious intent. The ML classifier and ClamAV detection strongly suggest this is a phishing or trojan delivery mechanism. The document's structure, with many links on disposable hosting, points to a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://ketchas.ru/uplcv?utm_term=cara+setting+vpn+di+android PDF link annotation
    • https://alistairmills.com/ckfinder/userfiles/files/1572253973.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/fasibu.pdfIn PDF document text
    • http://devison-matras.com/upload/file/85074794220.pdfIn PDF document text
    • http://doanekeyes.com/userfiles/docs/rijuxokoje.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/bitufuwexasubakoforofufin.pdfIn PDF document text
    • https://panoramabyty.cz/content/pitagegoxukufopejixoxowol.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/5161892157.pdfIn PDF document text
    • http://dep14kirov.ru/userfiles/file/detipiwexoxur.pdfIn PDF document text
    • http://donauwell.at/userfiles/file/fewatagame.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614024074e75f---32916031423.pdfIn PDF document text
    • https://digireg.si/upload/24530280842.pdfIn PDF document text
    • http://kim-clark.ru/files/file/92061670009.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/zirurenorofogilo.pdfIn PDF document text
    • http://w-w.cn/isee/pfm/cms/uploadfile/fck/file/tajibefafig.pdfIn PDF document text
    • http://khaskhaan.mn/uploads/userfiles/files/90555613736.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/xaxugazenisu.pdfIn PDF document text
    • http://ckm-machinery.com/userfiles/files/puletodumez.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/17359406816.pdfIn PDF document text
    • https://linker.tw/files/xupolafitizasamurojopud.pdfIn PDF document text
    • http://meetburgerusa.com/uploads/files/xaxuvotidegeledepusizup.pdfIn PDF document text
    • http://travelci.ru/ckfinder/userfiles/files/72116887357.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/1307524148613c90a88d6eb.pdfIn PDF document text
    • https://ver9.sonikgps.com/ckfinder/userfiles/files/bazumilugedivufutokera.pdfIn PDF document text
    • https://minervatech.work/js/ckfinder/userfiles/files/kekiperabigedonijuxo.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_off0000d826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD826 10616 bytes
SHA-256: 7d8f3de86bcd28012b15fc2a0f72baf364d28a89493c5898764bbf6ebbf4a181
font_01_sfnt_off0000f05d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001086f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086F 16320 bytes
SHA-256: 3533df76e8686e7a503eec5c8d595a079394bf23def61abe4d9df652c4847096

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