Malicious PDF — malware analysis report

Static analysis result for SHA-256 5145c48472edce24…

MALICIOUS

PDF

82.8 KB Created: 2021-09-04 09:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5c560997940761eaa5ceb8bfbd00b99e SHA-1: bbd5e42f7b37e411de2c5f822ddfa2923a7c4971 SHA-256: 5145c48472edce2429d7e55748484d26b7b4ef2209f8f880e98a8c2c2fc6508f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple websites, several of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish users or redirect them to malicious content. The file's structure and URL patterns are consistent with a phishing lure designed to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://macro-e.com/app/webroot/userfiles/files/64413403257.pdf In PDF document text
    • http://sixtyguildersresearch.com/admin/photos/file/42491891321.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087aefeb5395---penemiperotuvozuruxadurel.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a78cb0372---fozitamimejegudunonidasix.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/kuvuwelujaxasapi.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/ramidirajituwovolojulu.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/pt140k8l89mcnqip2bljvot8g6/nemaku.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/3344088041.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16078de2f56954---dubiduvedekenowojotosa.pdfIn PDF document text
    • http://lsbwg.com/ckfinder/userfiles/files/20210722/2316313726.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/d860eb7370eada9e5b9c550b53c5b7d6/83007821836.pdfIn PDF document text
    • https://ostrichpharmaceuticals.com/userfiles/file/58266019460.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/dezizesaniz.pdfIn PDF document text
    • https://xn--mgbaf4adbs1bd2i.net/upload/ckfinder/files/76018374150.pdfIn PDF document text
    • https://feniks9.ru/ckfinder/userfiles/files/51805523655.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/kemopivivil.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/92363345741.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/jlmqib442jose8ip2c6g4ge1n1/47165451759.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611fa5f18e03d---ninobewamenadiruvirox.pdfIn PDF document text
    • http://tragiaocolamsapa.com/userfiles/image/file/gogazobinovifo.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e1c1e513c8d---xekigesusere.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/887cc77406d1283e979569fa5ca7bc62/66522524291.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/34571497311.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=menggabungkan+file+pdf+online+tanpa+softwarePDF 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_off0000de8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8C 17260 bytes
SHA-256: a7bf4b1a1aa7f8c8173262974d27ba8a0f200c8d97a620115fb1ad85434c86b7
font_01_sfnt_off00010ba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C0 11084 bytes
SHA-256: 6b16d6b139b3aa68d4a967ecf513280519a3a932eb63c900035f6a4a60a480a3

Open this report in the interactive analyzer, or submit your own file for analysis.