Malicious PDF — malware analysis report

Static analysis result for SHA-256 09867640bc557d8f…

MALICIOUS

PDF

76.1 KB Created: 2021-03-22 07:44:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a54a1785d559d2f5338d1a163a37b4b8 SHA-1: 312e115d795cc08859d4c84dfd808428b054701a SHA-256: 09867640bc557d8f8beb249a09cd0d22aa925d4919ccd36a06f6c14f32c38ba8
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, specifically as a phishing or trojan. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or redirection scheme. The primary URL identified is https://soxebez.ru/123?utm_term=best+egyptian+cotton+sheets+thread+count, which is likely part of a phishing or malicious content delivery chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/123?utm_term=best+egyptian+cotton+sheets+thread+count PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4447640/normal_5ffbdce79023d.pdfIn PDF document text
    • http://julovafen.22web.org/duliboto.pdfIn PDF document text
    • https://zitadinenere.weebly.com/uploads/1/3/1/8/131871439/5432455.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413846/normal_600b6c38a4b16.pdfIn PDF document text
    • http://rixugogalide.22web.org/vupipoke.pdfIn PDF document text
    • http://fitnesspack.net/are_hannibal_and_clarice_in_lovew2yln.pdfIn PDF document text
    • http://rusherx.studio/569161998513xbmq.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/31361425245qvwbk.pdfIn PDF document text
    • https://xanuzejo.weebly.com/uploads/1/3/1/6/131637194/5d2cf.pdfIn PDF document text
    • https://tiwebusimevadeb.weebly.com/uploads/1/3/5/3/135346158/bdbd8a7a09118a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422884/normal_5fe35ad587914.pdfIn PDF document text
    • http://saxoxiwu.iblogger.org/gazek.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
    • https://uploads.strikinglycdn.com/files/453fc6da-0626-493c-95fc-b110b7ea5103/zaturopojefuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba1b4cb4-70d1-42b5-a2e9-05f17346f7c2/what_is_the_area_under_a_speed_time_graph.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ddc38bf-6001-4f7a-847d-7f9655d770aa/read_maya_banks_highlander_series.pdfIn PDF document text
    • http://xifawudezu.epizy.com/wazubutaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec2a751d-b967-4ac1-aebf-c33ed966d8a0/how_much_do_you_make_for_being_on_judge_judy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cb988bc-0d03-4fd7-833f-79962f0fa120/which_of_the_following_represents_electron_configuration_that_violates_the_pauli_exclusion_principle.pdfIn PDF document text
    • http://lemujiv.epizy.com/attachment_36_questions_lyrics.pdfIn PDF document text
    • http://sudimomovaw.epizy.com/loadconfig_in_extent_report.pdfIn PDF document text
    • http://tasukifuputuf.epizy.com/99008550789.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_off0000dcbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBC 5336 bytes
SHA-256: e0ee2b32a7304b764342878d80d43967a28548d69338ae726217018f60c939b3
font_01_sfnt_off0000eed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED9 10536 bytes
SHA-256: 3bff9ac91e094bc9415e61e1c3ea91326838f6bc761a7f7eca85160720b1d3c0
font_02_sfnt_off000112c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C7 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230