Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca1f20f0ae8ba5b7…

MALICIOUS

PDF

77.6 KB Created: 2021-06-12 23:08:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 901154cedb67eff14d534739914c2549 SHA-1: 3aeeabb238c231a0092db758d188455a94c133b5 SHA-256: ca1f20f0ae8ba5b7c071d5074dd530609bff6c83b34eade3ebbd0ad1d47c13e4
156 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML models and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains a lure related to 'cute baby boy pics for dp' and references wkhtmltopdf, indicating it's likely a crafted document for deceptive purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://drafthe.ru/uplcv?utm_term=cute+baby+boy+pics+for+dp PDF link annotation
    • https://nasroglobal.com/userfiles/file/78313155708.pdfIn PDF document text
    • http://rosswellbulldogs.com/clients/b/be/bee1e50a814ad4ba40998340b8964064/File/71257439113.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1e6df2fc2---gelazexuruserepunojat.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/2b7beb4c7b176970bec5d3d2b1578a3b/30563965852.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16088270bd0fa8---88580788353.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f78d54335c4a1cee0359f1123a6e12fd/fuzorosawiranekukosatu.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb92103051---25816456676.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/6ee90ce6f6a568bc8ae6f50d4bb7c295/42471296721.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/tawetawe.pdfIn PDF document text
    • https://q-web.ro/wp-content/plugins/super-forms/uploads/php/files/dbo5q1j7idekd2v0gvqqlcho75/fosolumuzutozarunowumuwe.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16080aec19ba57---nuvagumapemuzuwutan.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/m7496pe8d22ghgf49p64mva5h6/pamisipijowalevexev.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608728175d095---65021193636.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984fcfb32dc---14447761415.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/21436433947.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66F 5156 bytes
SHA-256: 1e3bd15a7720bb2308865ee9d9e968e3b3b0fbddb8d4b333c0a54265132fb0a4
font_01_sfnt_off0000f812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF812 10492 bytes
SHA-256: 3bae45d0d44a7fbb8b77ea3dd41a23f1f24cc8f22c66904aebfa54a5ae4d6b16
font_02_sfnt_off00011baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAF 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3