Malicious PDF — malware analysis report

Static analysis result for SHA-256 c324456837942510…

MALICIOUS

PDF

74.3 KB Created: 2021-08-28 04:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 06454c06120d16b64e163b6646cf5238 SHA-1: 8b0d982e0c4fe5d33ff8b0e791238e441c627eec SHA-256: c324456837942510286cc8b41036dfcfed9b3c2672023ae4503c4dd968e234a9
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous external URIs and links to compromised CMS upload storage, suggesting it's part of a phishing campaign or a distribution point for further malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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://nomylo.ru/uplcv?utm_term=half+a+world+away+one+direction PDF link annotation
    • http://babywagen24.de/userfiles/file/xuzajata.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160af9c6c0a427---47626868499.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607820e89f80b---2529238030.pdfIn PDF document text
    • http://sushrutproctology.org/ckfinder/userfiles/files/siwonetigizozuzena.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/s7388ho5upar4v97178mc5vep3/tedelabiwamomekawug.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/114529258960e11dbacc33d.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/vezodijagezokudof.pdfIn PDF document text
    • http://qazaqbanki.kz/data/content/files/25530503646.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d5204ecdbb---lususemelozo.pdfIn PDF document text
    • http://kibbkw.com/uploads/files/80578331331.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/1vt0h7rnvctr3fi1jh2akag3v6/revamig.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4d56c2014---51844062027.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab850adf292---91517187904.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/bojemif.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/a549e364b1ff06741a7eaeccb11d77d9/18811903859.pdfIn PDF document text
    • https://leonardscopysystems.com/home/leonards/public_html/ckfinder/userfiles/files/47924537003.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc2e7a1da5---58851245957.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/o0ggu9t2t786p30hnebhtd9ig0/54332037745.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/desowuvasuvimajinosegowa.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/luzanisilinenofusoneruz.pdfIn PDF document text
    • https://mihalex.by/files/files/55486946696.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/48c08a471db02278feff741a9a537d3d/gofewidatapet.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/nisekopizowekisuguxus.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_off0000c25e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC25E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA70 16068 bytes
SHA-256: 8321380393ed46ba0445b6f677689a6f0075e1f7e50c5eaf5b33e085203b80db
font_02_sfnt_off000103a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A1 10492 bytes
SHA-256: 41ee7ba4a9fce8739e53edf5f252cccbd3464cbe3be2241c5f099723a74527e3

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