Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd2cd07077e16c1…

MALICIOUS

PDF

81.1 KB Created: 2021-06-20 22:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c3d21101022333b07ef0a00f9f0805dc SHA-1: 389826906b335e78534144dc0ab8ee145a1b2012 SHA-256: 7dd2cd07077e16c1e3e27239fda1fd0c5b969b5025a31787a6a5f83ce12972b9
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or redirect users to phishing sites. While no scripts were explicitly extracted, the nature of the links and the detection suggests an attempt to lure users to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b3d41768f70---pupugovejumowizolomi.pdf In PDF document text
    • http://kiavysocina.cz/UserFiles/File/sojasikorezubibikipe.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/fuvado.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/najinutetosafewaraj.pdfIn PDF document text
    • http://bbbswalkforkids.com/clients/c/cf/cf8d0549bdc9bbdffca8bc0db9808b96/File/bikixibitotesefomiv.pdfIn PDF document text
    • http://roxburyhs1987.com/clients/63080/File/narenivenawugimivelagonik.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a64076494de---jamutipoluzabajomag.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9d4e0a299---tiratusoroj.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/1d91a0cd7c69b5bb87f4df0ffa85073b/18432081091.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/39et28rpahs4b6t6re72ut6oq4/38965049564.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941b84182a0---1311365793.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/86028304465.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c87e3acc0f---bagopemizodamumalo.pdfIn PDF document text
    • http://siembra.me/uploads/files/zuxuv.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/45526922397.pdfIn PDF document text
    • http://corporacionnoa.com/UserFiles/file/zoxas.pdfIn PDF document text
    • http://policylic.com/uploads/files/98327393495.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5df691b3a---69473929310.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/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=bfa+leveling+enchantsPDF 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3E 5156 bytes
SHA-256: 839e8001fea28464fb22f4f1f0f011320fa995c2d3c3ff248251280b32ce87e5
font_01_sfnt_off00010edf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDF 11460 bytes
SHA-256: f0c2c441c02fda90dc1a413ac19d259aa3aa3451b6629ce921108269d5f7b81f