Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3a16e084067c64…

MALICIOUS

PDF

77.8 KB Created: 2021-04-07 10:58:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f22d45fad6349cbd1a7623ef633795fe SHA-1: 62afa7d82cdb3cd3351b86907442675f577e3b8c SHA-256: ea3a16e084067c647c28dcf8e0de0ef4e28c802c23494fe430a1ac499dfef184
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, which is characteristic of phishing or malware distribution campaigns. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links for SEO manipulation or to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://gimoguvi.ru/wix?keyword=writing+linear+equations+worksheet+gina+wilson+2012 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4424632/normal_5fc96d519f81d.pdfIn PDF document text
    • http://dipitada.iblogger.org/rimedemurinifejovikedefo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489846/normal_60599ece15f4f.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://magudutetu.weebly.com/uploads/1/3/1/4/131437318/3860503.pdfIn PDF document text
    • http://xomerisupudegop.medianewsonline.com/lebesgue_measure_and_integration_by_jain_and_gupta.pdfIn PDF document text
    • https://metaxilam.weebly.com/uploads/1/3/4/7/134723413/kebonigulotizudoxib.pdfIn PDF document text
    • http://savadaqwe.space/canasta_basica_ecuador_2017xt6lz.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://rixexumig.weebly.com/uploads/1/3/2/6/132681576/vudelofepopux_vozenilodudup_kuzuwu.pdfIn PDF document text
    • https://waxogisuges.weebly.com/uploads/1/3/0/7/130776632/tidurefijol.pdfIn PDF document text
    • https://nisivijuwowog.weebly.com/uploads/1/3/0/8/130813757/sonevasufaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460461/normal_6066f6c57f7fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462986/normal_604030cad63ed.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://ruxurosagogaru.epizy.com/consulting_services_website_templates_free.pdfIn PDF document text
    • http://luvetux.myartsonline.com/gshock_rangeman_battery.pdfIn PDF document text
    • http://saluwagasa.onlinewebshop.net/66019339058.pdfIn PDF document text
    • http://weponigonimogo.myartsonline.com/blue_mosque_architecture.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2ED 5448 bytes
SHA-256: e1bd5c787d9fa958ce8cc90591bc145972c41761253f818c0af08b9f22e7e210
font_01_sfnt_off0000f58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58A 10912 bytes
SHA-256: f92481c4f87b8bb453e20cd7f05ee6852f48982eba33aa8350ae50528df519dd
font_02_sfnt_off00011af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF1 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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