Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba17fca2d351476…

MALICIOUS

PDF

64.6 KB Created: 2021-06-18 14:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12ab3aa72de6677d54df9b1c28f1dd73 SHA-1: b86b7e06eec5a5d3fd9aa434ed3d2f8cfea56ab2 SHA-256: eba17fca2d351476e88c3d5e332d3d1db32f7fa323c307b2379e12c1ef601ac4
156 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites, some of which are hosted on compromised CMS upload storage or disposable hosting, indicating a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure, likely leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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://topinsolventa.ro/userfiles/file/popepupepil.pdf
    • http://aarogyamedico.com/userfiles/file/sodazisaw.pdf
    • https://ascinfratech.com/clientprojects/trading/file/35045340441.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ceacc412fb---14420342611.pdf
    • http://fotofolliasanlazzaro.it/userfiles/files/jowipi.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d2bcbbddf---70965014415.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16075ecdf38290---97599424668.pdf
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/54117158844.pdf
    • http://ciarajewellery.com/editor_upload/file/72409197462.pdf
    • http://atek-ent.com/upload/file/dogesijituwuvataruzog.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e64bdbf12---33323372504.pdf
    • http://mikailang.net/userfiles/file/20210515195628_420133398.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=gora+filmi+full+izle+tek+par%25C3%25A7a
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdc3.bin
ffdad75ed28ff61989d9adc9f7324e5ebf5ee63c5441c90c27994d726d818c6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDC3 5196 bytes
font_01_sfnt_off0000cf6e.bin
87fd82f5f53ef294df6e046968c6ad2ee0f56ee501dbc1538681dd8d39bd97c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6E 11800 bytes

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