Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5292d84ea24bde2…

MALICIOUS

PDF

77.6 KB Created: 2021-03-07 06:24:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 126e771143ac90cdb84b43d16e2827e4 SHA-1: 8eca7e22c982a56d72d1639d7482ce8a83923bad SHA-256: e5292d84ea24bde2be651dc13e347606031df5e1619cef56564e915f298b143f
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/wix?keyword=girlboss+pdf+espa%25C3%25B1ol PDF link annotation
    • http://umniashka.ru/sedatopagenimupurufuzoxesbnsjb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452374/normal_601ead87a7e01.pdfIn PDF document text
    • https://puwiwasoz.weebly.com/uploads/1/3/2/6/132695956/72644.pdfIn PDF document text
    • http://dujifasuda.iblogger.org/how_much_does_it_cost_to_ship_a_30_pound_package_ups.pdfIn PDF document text
    • https://cdn.sqhk.co/forexidof/Ijcgfhb/7554868798.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/jBm6hbw/rejizurezezuvax.pdfIn PDF document text
    • https://cdn.sqhk.co/votawusebak/vid91NP/zombie_frontier_2_mod_apk_revdl.pdfIn PDF document text
    • http://covid-19online.site/worry_tree_worksheetwzevt.pdfIn PDF document text
    • https://cdn.sqhk.co/nulaliki/ahi2zLW/wechat_application_for_android_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/noxuluni/3egDajf/sujogukivizenakulij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466364/normal_603eaec0f3863.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369336/normal_600505cd33959.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/ghg2ibl/angry_crab_menu_east_mesa.pdfIn PDF document text
    • http://prostotit.site/mixexomabotafaxogjegjv.pdfIn PDF document text
    • https://wavujosivisero.weebly.com/uploads/1/3/2/7/132740585/4778490.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/e8hfigw/jisadil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468563/normal_600560ed0e841.pdfIn PDF document text
    • https://cdn.sqhk.co/bujavenizake/LOVgdQ5/nawuluforobinuso.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://wajodojizofe.epizy.com/facebook_page_analysis_report_template.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_off0000e25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25C 5020 bytes
SHA-256: 6c0e7266c852a704f53d2d0662a590d55d68fc20f5fea9aef4dfa84c3c9d9424
font_01_sfnt_off0000f363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF363 11128 bytes
SHA-256: 4de245ce8d2666419e29193b8981318a05c9e68019ef8b54e242881a8bd76a23
font_02_sfnt_off00011942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11942 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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