Malicious PDF — malware analysis report

Static analysis result for SHA-256 055c7990560912c4…

MALICIOUS

PDF

214.1 KB Created: 2021-06-25 08:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ddd4837f1d79f96befee8c8c311d9727 SHA-1: 67c189a24d716892787b0cc1a124bf488cb9051d SHA-256: 055c7990560912c404eeeeec4a163bc5147f04783e4802954b6feb3c1f880008
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links pointing to compromised WordPress upload storage locations, suggesting an attempt to host and distribute malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • 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.
  • 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.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b7922e304---sulolarewonax.pdf In PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-25/20210525194938701953.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/90814504622.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd7dde4b75---9810350284.pdfIn PDF document text
    • https://morabia.fi/images/file/malovuzanesawugesesawi.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/29317fe10d10df1bc6200a5da7f7a7d9/47885153169.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/dfb2267aabd0c03e4c5c679e02f860d2/43124365200.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af7ed5cac4d---50626551790.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160805a2d8c822---4434151012.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2315b4ad27---57954770421.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/zekoloviz.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8952576cfb---31886670549.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/b1589711ae1427c5e6b72ce09dfd6725/kamotopetaneb.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/qqqmtvr6fj7auqp1jm4jvqd32o/22653463454.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/gobuwemazera.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/58621912358.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=information+geometry+and+its+applicationsPDF 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00030a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A4F 5512 bytes
SHA-256: 7fb918be2bfc0895c32e8b2b0e9b4e63c84a20f954e1a6d88e6fe940a8b6cafc
font_01_sfnt_off00031d03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31D03 12620 bytes
SHA-256: 9d79a0a81fb1c6b1ec1eea4337d5560586b531cf6780a868069b553fbd085136

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