Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ec8643c5dd2189…

MALICIOUS

PDF

66.8 KB Created: 2021-02-24 06:42:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7d5edc616263732f23ddd98584f254d8 SHA-1: 56cc95590ce514a475da7c8b9f0a8615e603c29f SHA-256: 95ec8643c5dd21892b08961f4ae4bab8817dd7de81f1d9db98489f9d6dbdeb15
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://leonvi.ru/123?utm_term=food+matters+holly+bauer+ebook PDF link annotation
    • http://fumufede.iblogger.org/dowizigezezanomijinujub.pdfIn PDF document text
    • http://topvideo.design/focusrite_mix_control_no_hardware_connectedq7xdt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405687/normal_600b2ee805d2a.pdfIn PDF document text
    • http://xasujaru.22web.org/dabamerakipudigivebiwubig.pdfIn PDF document text
    • http://bedomukuruxe.22web.org/lunolejunererafupejijobom.pdfIn PDF document text
    • http://sberpodarok2020.online/98079436266k73st.pdfIn PDF document text
    • https://nuxinipimop.weebly.com/uploads/1/3/2/6/132682773/tirexeponufimam_ragitasego_fuwojowa.pdfIn PDF document text
    • https://wukarogokemek.weebly.com/uploads/1/3/0/7/130739107/gegusipemasuxud.pdfIn PDF document text
    • https://rupimobo.weebly.com/uploads/1/3/4/8/134891389/2769322.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://maduxefolus.epizy.com/adventures_in_babysitting_2016_movie.pdfIn PDF document text
    • http://miloxirabufa.epizy.com/bertie_botts_every_flavor_beans_color_guide.pdfIn PDF document text
    • http://rilokew.rf.gd/bourbon_tasting_notes_template.pdfIn PDF document text
    • http://zixadadafupeg.epizy.com/apple_logo_png.pdfIn PDF document text
    • http://xofududegotu.epizy.com/39110438110.pdfIn PDF document text
    • http://rimalapotozuf.epizy.com/amendments_in_gst.pdfIn PDF document text
    • http://netixoxolasabo.rf.gd/why_does_my_thread_keep_getting_stuck_in_the_bobbin.pdfIn PDF document text
    • http://bubalafugevale.rf.gd/76280877955.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB06 5328 bytes
SHA-256: 13893f6c32aa685d5169c13f4c02dd282cb4801d09f46d449317b2c8a1d20ea5
font_01_sfnt_off0000dcfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFB 9788 bytes
SHA-256: 65db788b9be550c33a2e965da94d41e89c46bf56c72eeba0fdf41135842e9a6e