Malicious PDF — malware analysis report

Static analysis result for SHA-256 e862e8ccc05887e2…

MALICIOUS

PDF

67.0 KB Created: 2021-02-17 19:39:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 57eb0335d073647afe35078b9ea158ef SHA-1: 36c9a8a73bbdca6b5ba0ec20073b2dd6ca7688ea SHA-256: e862e8ccc05887e24ef3fb5402b440dec51b7a8e97c37fe92b40124ae73ce0cc
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, indicating a link farm designed to redirect users to potentially malicious sites. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly suggest this is a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the nature of the embedded links and the ML classification point towards an attempt to exploit users by directing them to compromised or malicious web 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://maypoin.ru/wix?keyword=non+mendelian+genetics+questions+answers PDF link annotation
    • http://9gusevshop.space/bibafowagubp2uu2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379744/normal_6003b9e916de8.pdfIn PDF document text
    • http://mebesovinu.22web.org/11005839991.pdfIn PDF document text
    • https://kerizivol.weebly.com/uploads/1/3/4/6/134665291/7368043.pdfIn PDF document text
    • http://idealica-italiaofficial.site/153426715695ta91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470226/normal_602975d732d3f.pdfIn PDF document text
    • https://fegojobakib.weebly.com/uploads/1/3/1/1/131163858/0840fc7.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/biomedical_science_graduate_cv_template9s1ze.pdfIn PDF document text
    • http://navewezaninub.iblogger.org/arabic_font_for_android.pdfIn PDF document text
    • http://scarcebook.com/775338746564zec8.pdfIn PDF document text
    • https://vosanuxavuzom.weebly.com/uploads/1/3/6/0/136089669/d7b9aa5a1.pdfIn PDF document text
    • https://zanefasijim.weebly.com/uploads/1/3/5/9/135965469/dufol_nizobedidaze_luguwup_gatasiwazaxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456140/normal_6020c0e01e035.pdfIn PDF document text
    • http://cloudplay.xyz/upload_to_google_docsv45wi.pdfIn PDF document text
    • http://ibkreactiva2020.com/beard_styles_2020_for_bald_guysrqq4h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465025/normal_5ffd44da2302a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rivebop.epizy.com/chitrangada_bengali_full_movie_hd.pdfIn PDF document text
    • http://kufawabizoz.rf.gd/womip.pdfIn PDF document text
    • http://lajonapeloros.rf.gd/chitarra_romana_sheet_music.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_off0000ca9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9A 5448 bytes
SHA-256: e805b0ff482d2c2b8239450a6225f55c0ab726f1af03c0ffd6b729925bca9096
font_01_sfnt_off0000dd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD14 9812 bytes
SHA-256: c3adad95bd10f3b6dd4f2d3260da5088db22d141952661c8ec35688e34cc0397

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