Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b0eddcf09ad2ba…

MALICIOUS

PDF

105.1 KB Created: 2021-06-06 20:10:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 38343d408101407abd7bee72e6f7395b SHA-1: 410a99af5181d02e5538ac1b9743dfba92c6c18c SHA-256: 38b0eddcf09ad2ba7ad30aaef5bce78b2365bc89eec677fbfe5c56aedafec611
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/123?utm_term=formule+chimique+sulfate+d%2527+aluminium PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385216/normal_5fc810d577049.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4420028/normal_60afed91d5253.pdfIn PDF document text
    • https://lakafirawitekir.weebly.com/uploads/1/3/4/0/134018328/bojurunenazojaduxo.pdfIn PDF document text
    • https://kifowufowuvix.weebly.com/uploads/1/3/5/3/135392599/4efe3ac97a.pdfIn PDF document text
    • https://talogaxuzule.weebly.com/uploads/1/3/4/5/134596774/6380169.pdfIn PDF document text
    • https://xifamileg.weebly.com/uploads/1/3/4/6/134687686/tuwaz_didamabuvo.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4473919/normal_60b43db143061.pdfIn PDF document text
    • https://nusomosuguxapo.weebly.com/uploads/1/3/4/6/134693055/bixix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474719/normal_5ff9c3dc0cf32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460954/normal_5ff45372338f5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ranetowunose.pbworks.com/w/file/fetch/144716202/59690443933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aa055b7-1873-4e8e-816a-9e9cddf037c9/90407718459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/341efd42-0ce0-4c2e-bb4b-e41b5d565e1f/can_you_use_coleman_hot_tub_in_winter.pdfIn PDF document text
    • http://pajinap.pbworks.com/w/file/fetch/144662091/furubug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/464d7286-dc41-43f7-8c72-92060fc372ef/how_to_start_a_conversation_about_open_relationship.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4a48de2-3cc4-4ffe-8047-f62281fc6d22/18610885974.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/w/file/fetch/144415686/oxford_ib_chemistry_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec09d811-1039-4754-8ebb-ceb8bab1e772/82135521073.pdfIn PDF document text
    • http://mapaduzipi.pbworks.com/w/file/fetch/144603756/ver_moises_y_los_diez_mandamientos_capitulos_completos_online_gratis.pdfIn PDF document text
    • http://gapufipi.pbworks.com/f/ap_biology_campbell_8th_edition_download.pdfIn PDF document text
    • http://panuduxeruv.pbworks.com/f/58254088805.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d815141-169c-4099-8db2-b5147a2ccf3e/silva_mind_control_techniques.pdfIn PDF document text
    • http://puzavofan.pbworks.com/f/5284066355.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a34e0594-d983-4e43-bc74-694b4e601f12/rainbow_vacuum_price_2018_australia.pdfIn PDF document text
    • http://jowenoxo.pbworks.com/f/94519763092.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14493 5376 bytes
SHA-256: 4235b6ab29d07fc3a46ed3172bc99310d1a789e9757ed239a954d9054d207a03
font_01_sfnt_off000156b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156B6 12840 bytes
SHA-256: 90e3a81aba27795ffe6b7e405fef39b46ae95e488fd45847332cd676c16309ad
font_02_sfnt_off00017f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F8B 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7