Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fdf9051494c70ce…

MALICIOUS

PDF

79.4 KB Created: 2021-03-30 20:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1bfd86d91b24cd4c1d183dcc25c23c0d SHA-1: 4435ea223b71250b4a451ff11573e4afde5109f1 SHA-256: 7fdf9051494c70ce57e8edada8d95dc2ee74c62e3d263af075693aa74810d8d0
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 0.9997

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/123?utm_term=iphone+icloud+unlocker PDF link annotation
    • https://cdn.sqhk.co/jivonaxadu/dzZy5uH/ku_basketball_throwback_jerseys.pdfIn PDF document text
    • http://manovina.mypressonline.com/straight_talk_mobile_hotspot_internet_not_working.pdfIn PDF document text
    • http://botefedej.sportsontheweb.net/3080907038.pdfIn PDF document text
    • http://vupaniseb.iblogger.org/community_assessment_tools_in_social_work.pdfIn PDF document text
    • http://dugarudewemudo.sportsontheweb.net/anne_of_green_gables_book_2.pdfIn PDF document text
    • https://cdn.sqhk.co/naxupowu/gch1wgh/dagegexomipaba.pdfIn PDF document text
    • http://sabovibin.medianewsonline.com/38162416276.pdfIn PDF document text
    • http://wabaxifejem.sportsontheweb.net/buwiketepu.pdfIn PDF document text
    • https://cdn.sqhk.co/kepebeso/hhc3jen/66199480595.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/VieoTjj/driving_simulator_pc_online_play.pdfIn PDF document text
    • http://xevamoz.mygamesonline.org/94024339208.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nunavaxukozu.onlinewebshop.net/gallstone_diet_sheet.pdfIn PDF document text
    • https://f8ba888e-8f71-4fde-8303-550399648f4e.filesusr.com/ugd/17ce20_b5d8dae5c4024526a3dab98367becb9f.pdf?index=trueIn PDF document text
    • http://pofijiserige.onlinewebshop.net/calendrical_calculations_the_ultimate_edition.pdfIn PDF document text
    • http://vebusatoro.atwebpages.com/wusozewiferozetiva.pdfIn PDF document text
    • http://pasifowon.atwebpages.com/pembuatan_biogas_dari_kotoran_sapi.pdfIn PDF document text
    • https://06e27459-8a58-4d01-a48e-f853eab966f6.filesusr.com/ugd/55f1a0_95e6a4c4f89e47849a236e5b1d07e6db.pdf?index=trueIn PDF document text
    • http://mevonaku.rf.gd/credit_report_uk_living_abroad.pdfIn PDF document text
    • https://696f1bd8-06c3-47a7-a8f7-e83e17ec8d18.filesusr.com/ugd/5ad03d_a5a269cff6f44e1594f933b4f3c33935.pdf?index=trueIn PDF document text
    • https://bac325b5-3710-4a60-ba01-c1ac5e8a7650.filesusr.com/ugd/c111de_88a60a267c8e48b8a341fd6909bd7cb3.pdf?index=trueIn PDF document text
    • https://a1d3e036-d9a1-4be1-9d2f-eedbb581cb22.filesusr.com/ugd/3ce946_cccbfa838bf643b2b2e1179d3bd27fa2.pdf?index=trueIn PDF document text
    • http://zasuwunal.myartsonline.com/18589824739.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_off0000ee3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3F 4772 bytes
SHA-256: 84e61f39e429e5b65580e8e36cc9f7331198dfb1a61ee9cca1641d035e787243
font_01_sfnt_off0000fe73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE73 19676 bytes
SHA-256: 0a432090aa49e88fbc308162fd7420b21d77afb9a14b1147de03e7bfff54499d

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