Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad3d0073e0c0a32c…

MALICIOUS

PDF

82.9 KB Created: 2021-09-07 10:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8b9ed15f2d15f87d49c4e13b6c0ce891 SHA-1: 6f297cad24af2d84e10a3949d73e7dd3db5b8ae6 SHA-256: ad3d0073e0c0a32c9115b2661354532c4a7a44e0fae7a529472fafbd055efa74
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. Heuristics indicate this is a link farm designed to obscure the final destination, likely for phishing or malware delivery. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://pistant.ru/uplcv?utm_term=your+song+piano+music+pdf PDF link annotation
    • http://domoticasociale.it/immaginiNewsletter/file/vibof.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/46265e49bd07b24841ee7b39e7cb03cf/binorupasanizasuvu.pdfIn PDF document text
    • https://31app.com/userfiles/file/21865644813.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7d89f4179---rubiwav.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e0271837f---jiwibumurafigivoxa.pdfIn PDF document text
    • https://sharenkon.com/files/25164980480.pdfIn PDF document text
    • https://stabiactiv.com/userfiles/file/94052728503.pdfIn PDF document text
    • http://www.oomewatersport.nl/upload/files/pimarababiwogujuf.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a964e427e8b---bukafetug.pdfIn PDF document text
    • https://elminhaj.org/userfiles/file/sisani.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/tidafajezimedafugumut.pdfIn PDF document text
    • http://www.firengo.com/userfiles/files/35786698050.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0b76e722a---morifosutij.pdfIn PDF document text
    • http://samwha.com/upload/userfiles/file/gakofedorusob.pdfIn PDF document text
    • http://edgecs.net/documents/82883029110.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a885de91cca---fomigux.pdfIn PDF document text
    • http://healthywithhart.com/res/file/nafopabafamejujis.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/1m930v30tgb7smf992u8m93afj/remelumaranajoxigotow.pdfIn PDF document text
    • http://thegioixedap.net/upload/files/magexok.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16132b66633e57---23908410669.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/radomerafumev.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/vusanuwekawemo.pdfIn PDF document text
    • http://eperon-kochersberg.com/img_db/3265291031.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5F 19152 bytes
SHA-256: df08114c5600809271fd9936978fd3f1f76a7f621e96a0d775612e7109a31349
font_01_sfnt_off00010de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE9 10772 bytes
SHA-256: e06ac4647d46cb4e5584a392c7f8b37a56c2a0ccd7250069b5175795facebab6
font_02_sfnt_off00012678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12678 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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