Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bb0189447eaaedb…

MALICIOUS

PDF

80.5 KB Created: 2021-09-17 06:35:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2cdd748072f3306d9ebb3f4c650d2f13 SHA-1: d0b8e320543be4813b05adafdcc14e76d5bca95e SHA-256: 2bb0189447eaaedbedaf7acdebea0b5f119ba0d73540ec527a73718cfb1b7804
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for exploiting vulnerabilities or redirecting users. The presence of numerous external URIs, many pointing to PDF files on various domains, suggests a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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 http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/lewamutax.pdf In PDF document text
    • https://alajuusa.ee/media/contents/file/nebavofizagewizusi.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/tufovuzulabum.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/bisokumipitutisareneb.pdfIn PDF document text
    • http://careerpathrecruitment.com/swapscan/app/webroot/js/ckfinder/userfiles/files/wukorixujatebefelo.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/18776566353.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/6b46ce3000fa603d80ff111742032264/daxagodibobemomipewuzo.pdfIn PDF document text
    • http://nifaelectronics.com/userfiles/file/10051539359.pdfIn PDF document text
    • http://sunnyten.net/userData/board/file/66963828093.pdfIn PDF document text
    • https://vcubusinesssolutions.com/userfiles/file/xubidesusubaberigemu.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/42045863653.pdfIn PDF document text
    • https://maurinet.com/userfiles/file/xevos.pdfIn PDF document text
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/vuneveforovufijigokora.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/33397721607.pdfIn PDF document text
    • http://hairfibers24.com/upload/file/zomoweludigadiwevifokatum.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/65242163703.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/161305f2466ba4---412616869.pdfIn PDF document text
    • https://eastmangroup.org/ckfinder/userfiles/files/xavakikodijofav.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/tavovufewa.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/pixetegab.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/maramunarerodigaxenoletug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=real+giveaway+iphonePDF 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_off0000d4b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B3 10476 bytes
SHA-256: 0b9f4d6ec9379ae022d55be894b7e9568b50e8d3369c35f45f66e65e824c7097
font_01_sfnt_off0000ec6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10480 18408 bytes
SHA-256: 6198542780347407426607e4e796edd31ef731b10ec39d5f3ddc04eae4a0b102

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