Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5537a7559d007de…

MALICIOUS

PDF

78.8 KB Created: 2021-03-25 12:10:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d340406c19781dfd6660bf5c1ed4cc63 SHA-1: 2357827f6ecaa1b778d8a2e02c1a17e5f1c4bcf9 SHA-256: a5537a7559d007ded884fb1a6d95ccf27c7db80177f0ae544da6112fc0fc38b0
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 0.9996

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/strik?utm_term=snapper+pro+s200xt+problems PDF link annotation
    • http://bcpzonasegur4viabcp.com/deca_marketing_communications_performance_indicatorshql6f.pdfIn PDF document text
    • http://negozio50sconto.info/mufujajg5bs6.pdfIn PDF document text
    • http://souve.me/4701852985t7a4z.pdfIn PDF document text
    • https://xekukagakodepa.weebly.com/uploads/1/3/3/9/133999272/levijizeb.pdfIn PDF document text
    • http://servempieza.site/56880684009gbgr7.pdfIn PDF document text
    • https://rababavuve.weebly.com/uploads/1/3/1/8/131871532/turigivi_wofakefalo_sopomidafosavu.pdfIn PDF document text
    • http://stroy-level.ru/ninja_300_service_cost_2020tf4d7.pdfIn PDF document text
    • http://vkrowl.com/4-3_trigonometric_functions_on_the_unit_circle_worksheet_answerslb3js.pdfIn PDF document text
    • https://zutafagufagupak.weebly.com/uploads/1/3/4/2/134235067/javopalazoxedi_kakure_xuvaluwozuliwot.pdfIn PDF document text
    • http://itdiscounts.info/37108214397vwic.pdfIn PDF document text
    • http://sell-toclick.online/81220927546a7fph.pdfIn PDF document text
    • https://xexibuwowixuzu.weebly.com/uploads/1/3/4/4/134455615/5e263f459e.pdfIn PDF document text
    • http://paxabak.mypressonline.com/cambio_climatico_para_nios.pdfIn PDF document text
    • https://sowibize.weebly.com/uploads/1/3/5/3/135348762/gixan_zebegazexena_bolekuduvedol.pdfIn PDF document text
    • http://baranaydin.org/26461480718bz5sw.pdfIn PDF document text
    • http://aov.one/euro_truck_simulator_2_product_key_2012tc72p.pdfIn PDF document text
    • https://loropigofog.weebly.com/uploads/1/3/4/5/134595907/4f982ef6a5c8b.pdfIn PDF document text
    • http://xilibinebosapeg.mywebcommunity.org/36815927728.pdfIn PDF document text
    • https://jorevubo.weebly.com/uploads/1/3/4/8/134869484/fazatopesamuborofese.pdfIn PDF document text
    • http://vodoroding.info/what_did_leta_lestrange_do_to_grindelwaldyxsvm.pdfIn PDF document text
    • http://larijasetejupaz.mypressonline.com/wexekusabosedut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lodumojokexiku.onlinewebshop.net/carols_of_the_bells_piano.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_off0000f1e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E6 5552 bytes
SHA-256: fce296b8cab4d038ce30c7d84efadfb5ee18d1a38a1adb2f37152791b5e2a883
font_01_sfnt_off000104b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B3 12188 bytes
SHA-256: bb83ada85e81f416662a7ec86f1cb00e812411e62dcc06b02751d79a7833828d

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