Malicious PDF — malware analysis report

Static analysis result for SHA-256 05a1677f234ad299…

MALICIOUS

PDF

80.5 KB Created: 2021-09-20 06:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 60deb587f8979d5ea9472ece3d3576bb SHA-1: 8a7bfdc43fd5a5e16e84ca6d9a389684e502d676 SHA-256: 05a1677f234ad2992c317b14d2cb6a6ee6e63ae2096cca8a29bab8a82702b764
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress uploads and disposable hosting, indicating an attempt to distribute malicious content or conduct phishing. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the nature of the links and the PDF structure suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16134ae48b546b---wojagowisoropele.pdf In PDF document text
    • http://irvine.songhakbbq.com/uploads/files/duxemosulakabawuxajorijo.pdfIn PDF document text
    • https://guptajimarriagebureau.com/userfiles/file/negari.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/9337374037.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/kugaruromotapitusabesa.pdfIn PDF document text
    • http://eternoohydro.com/d/files/bawunos.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/88124237812.pdfIn PDF document text
    • http://185.33.116.142/~bbyacht01/upload/files/biturovot.pdfPDF link annotation
    • http://synergienetwork.net/userfiles/file/ligonuraxiferujeganitavo.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/79374249781.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/2039bf04e31e93592f53c22ecdc93fbf/90962468190.pdfIn PDF document text
    • http://393citizen.com/upload/files/1788141140.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-9-5/20210905235816426720.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/161416ea3642a1---56662147237.pdfIn PDF document text
    • http://vietnam-intraco.com/webroot/img/files/nadapidimexazibatizu.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/22155402693.pdfIn PDF document text
    • https://cylinder96.ru/admin/ckfinder/userfiles/files/deduvotu.pdfIn PDF document text
    • http://canvangdientu.com/images/file/41016126717.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16145a4871beea---60886979142.pdfIn PDF document text
    • http://hoya889.com/upfile/files/20210914091033.pdfIn PDF document text
    • http://baheth24aqari.com/ckfinder/userfiles/files/17475265630.pdfIn PDF document text
    • http://uat2.hkha.com.hk/ckfinder/userfiles/files/8975835796.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/tagatigu.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/49699319872.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+blur+photo+background+in+androidPDF 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_off0000d6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D8 17244 bytes
SHA-256: 08a2e190ec82ade0c21bbe71d32285ce4bcb438b69c6921896c61eb41b913ef9
font_01_sfnt_off000102ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EA 10900 bytes
SHA-256: ba368453bee1bdb8e765cf5e7905e8072698641818e2e73acde4c812a21ab3ed
font_02_sfnt_off00011ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1