Malicious PDF — malware analysis report

Static analysis result for SHA-256 e23294a40dcc8155…

MALICIOUS

PDF

80.7 KB Created: 2021-08-21 03:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7fc36064378544292d6ec453ace43658 SHA-1: cf5698170872a15d508d11df5c6916f0751eeaef SHA-256: e23294a40dcc8155860848dc13620264a89b293f9309d0c4fd6e2e7552e5d7ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for Pdf.Phishing.Trojan. The presence of numerous external URIs and link farm indicators suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://wastran.ru/uplcv?utm_term=kmart+homemaker+ice+cream+maker+instructions PDF link annotation
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/4772ea4f0ed94c69c716bfdae3c43420/xejoxobutiwafu.pdfIn PDF document text
    • http://redeyeldn.com/userfiles/file/wadibidemenagazimusiwen.pdfIn PDF document text
    • http://flexa.cz/docs/file/gitanagukewoz.pdfIn PDF document text
    • http://bhhangkhong.com/upload/images/files/33215507418.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a633e73a2---setewutopalasakikumote.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/68a6fe3627f5b38b314a61541a64abb9/nupazuwakag.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/21711328815.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/jegek.pdfIn PDF document text
    • http://jcon-aps.dk/userfiles/file/vuwodapesimojotofulutop.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/6395751439.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/xoludowoletorenagi.pdfIn PDF document text
    • http://fireprovietnam.net/luutru/files/rekowimidenolofisax.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/xoxubibewuresobugafew.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca13fea47e---pagoxejufarepax.pdfIn PDF document text
    • https://media-get.com/userfiles/files/39745663108.pdfIn PDF document text
    • http://sicilyontable.it/userfiles/files/22682815087.pdfIn PDF document text
    • https://digireg.it/upload/noxaxixamuzakozixudaw.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/pce9qrnls89aevr2e8ce7gum8r/bitinen.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/55143079061.pdfIn PDF document text
    • http://artkulinaria.pl/sites/default/files/file/16703176808.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/1254437045.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/bbae638f5112368f2c64d83c92613bf1/zisesixuzeku.pdfIn PDF document text
    • http://bydnjl.com/userfiles/files/depafuzofarekisiw.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/56c0bef8be48914c6a4c1687e24bfab5/givorufexopubojani.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/64780352112.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/4g89pq0pku1d7fo0jt10ia70dl/75973704456.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_off0000d8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FF 16968 bytes
SHA-256: 314fc0caa9aa693d5d357010aaa975e3c75e905d608d006e1aee152f1afb62b8
font_01_sfnt_off000104d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE7 10632 bytes
SHA-256: 70f64da49eb714d04bc2cb37579489f379048d7d692af0e7f8a536a3d5531e29

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