Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0fa5032721a794d…

MALICIOUS

PDF

87.4 KB Created: 2021-06-07 17:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 750353044893a3e4d51c696cc0f11916 SHA-1: 1a2249b0bcd9ee56fecb336843b021f3fbe5ee58 SHA-256: e0fa5032721a794d18161a40f6bd3aa1709df45623cdac46949ab3c96a4448e4
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm pointing to compromised WordPress uploads, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the nature of the embedded links and the heuristic firings point towards a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://irlanc.ru/uplcv?utm_term=bhajani+chakli+recipe+in+marathi+video PDF link annotation
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/349a53a62c86c2fbbbb00d1d769b32e0/kitudobujaropimajujex.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/77145822644.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f09e71d67f---ranufivomo.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/34809004423.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/213eb4e8ca788700cac1e3744edba939/53464924617.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/42ad9e8fb9e1bff4c9d489263bab01c6/18418000189.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160964cc1eea3b---71417172909.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c52824f828---karifedezajejiratosatema.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/xezepira.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088ead013237---fuvowelepotudodoxi.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/bufet.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/34825926967.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/d1a6445a6318ee87c1a0f0e68a4b6464/51788755884.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160badbee3693e---49230491422.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16081b90f7fa28---64466323500.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16075fbd51dcf8---vawalinove.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/711c9fbf29d9aeb0dee3b5d44808aafc/57605500197.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7A 3552 bytes
SHA-256: 2975c2b30c6bfb9153386e9ee5071de03252ace9fec0d10dbf68ebed6883688e
font_01_sfnt_off0001083d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083D 5384 bytes
SHA-256: 6d2b8443784d49cbb15f41057313096f5e07f65726eff09ba863c9666001887b
font_02_sfnt_off00011a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6F 11088 bytes
SHA-256: b46142b3fed52a2a7b6401d3ec6bd1d5e36865e90d7ee1dfde425ebad0c78b4f
font_03_sfnt_off00014090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14090 4252 bytes
SHA-256: 19a37c25350be5afe2713c90bf15d9ca31ea07934ae2dbb1d0be318f3d433d38

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