Malicious PDF — malware analysis report

Static analysis result for SHA-256 51596786791a3e85…

MALICIOUS

PDF

60.0 KB Created: 2021-06-24 22:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 95a70bc79a6305e346d2efc10819f60f SHA-1: ae72b27313c3db531e171c98677e36755d8a71e9 SHA-256: 51596786791a3e8506f5445060b179d161598e1104649f012a56c4acfc87d155
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links pointing to compromised WordPress sites, indicating it functions as a link farm to distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan. The primary attack pattern involves luring users to these compromised sites via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7994

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.
  • 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
  • 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://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/sqqcr82gvl81b9mnaup4r9jl2n/damureba.pdf In PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/960e1f60d1cf42f51c10daf3a69607e6/6796257120.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/33d35c0cc90c0ac9f8ddd56b600af47f/narowafuf.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791a93a4795---gebige.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/xosatunozubin.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/runujemiwekojozuwib.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/a15e4f5a37723994be3d283a43e19d02/sesilikebufimifadawuzad.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160885f61dd1ca---wawobuvuvusadu.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/gexegapi.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160749ac5ee2d0---69604624507.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/10936821395.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/6d1912b895da941ac36897a0411c1287/20577729434.pdfIn PDF document text
    • http://menafundinfo.com/userfiles/file/18772733111.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/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=illuminati+jim+marrs+pdfPDF link annotation
    • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3E 5200 bytes
SHA-256: 1ec297f0a52a1a8cf5dae8ac8019758491dd537dfd45ea6249cddd1779953583

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