Malicious PDF — malware analysis report

Static analysis result for SHA-256 da8c0c6b2f85fd83…

MALICIOUS

PDF

70.3 KB Created: 2021-05-08 06:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 597b736a5a01585be3ff20a7c6571df5 SHA-1: ea692b80637de500db9bf677894318f460dbfee5 SHA-256: da8c0c6b2f85fd839e0b0c7b738208dadc275249f24c6ae8b9a5d93378986fed
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains numerous embedded URLs that point to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the nature of the embedded links and the overall structure strongly suggest an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074135e3cd76---gogapifevibazevobejamefuj.pdf In PDF document text
    • http://banghaija.com/userfiles/file/8363816544.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4c6574255---wifebugi.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-4-28/20210428233108855275.pdfIn PDF document text
    • https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/hf66nv9cifdfjmst17o4s3i0m0/nawesume.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a16f14cdc---bifefajuliwefalebuvu.pdfPDF link annotation
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085c432aca13---nitomu.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160732fd38b4b3---73875920862.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/ummikmgsl38v066f6mo8dd7u05/23730489039.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718536d8921---91588933195.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-7/20210507025504456830.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/rlcvolg8l5g9ffmj4k4bi8rd1c/24641358891.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/2vum8ujcpgg0avtn5hfmpmsgkv/53394949663.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16084b363f292b---pexezobavopefal.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/e2f421ed18ae8a9a0b2375cfdba3143a/18713680691.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/~3/6naE_Nh8_CY/uplcv?utm_term=printable+timeline+template+pdfPDF 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_off0000d5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E8 5152 bytes
SHA-256: 8151e6915d5c0b5b5006aee8f6503ae567e436c4b6d1df509be9ebddf46c1711
font_01_sfnt_off0000e750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE750 10940 bytes
SHA-256: 0577bf4158037690963f459a48662d1f3bb1606d5d2237a7f8d0a013111a792f

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