Malicious PDF — malware analysis report

Static analysis result for SHA-256 c773acd8d3dd7025…

MALICIOUS

PDF

70.1 KB Created: 2021-03-16 07:05:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9a845527d3249931701606d66aac92ce SHA-1: 9a79825f476924ae6cdfe662a3c279197638975a SHA-256: c773acd8d3dd7025cf62bed1d19f41e8f648181391d72010db99c6779c7f04c3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wix?keyword=which+series+of+subshells+is+arranged+in+order+of+increasing+energy+in+a+multiple-electron+atom PDF link annotation
    • https://cdn.sqhk.co/zejegure/1y1X85L/niwebemodubomukarus.pdfIn PDF document text
    • http://tafasizogir.22web.org/tepupapi.pdfIn PDF document text
    • http://fodulil.iblogger.org/tutorial_bizagi_em_portugus.pdfIn PDF document text
    • http://voseboler.iblogger.org/57401953167.pdfIn PDF document text
    • http://rofozazasi.22web.org/what_are_cultural_diffusion.pdfIn PDF document text
    • https://cdn.sqhk.co/rawerusiwala/eEqijMA/pibage.pdfIn PDF document text
    • https://cdn.sqhk.co/somufegojaru/hhrAkjh/gawepadekedegin.pdfIn PDF document text
    • https://cdn.sqhk.co/gukitane/hPoVAiI/belt_of_storm_giant_strength_5e_cost.pdfIn PDF document text
    • https://cdn.sqhk.co/livulopo/KPCigS3/87201354101.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/financial_reporting_standards_nz.pdfIn PDF document text
    • http://viraxisizix.epizy.com/35740325519.pdfIn PDF document text
    • http://lafowifuvaxa.rf.gd/johnson_outboard_motor_owners_manual_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/795a9a7a-d1ee-4f9e-9e3f-63be041cc24a/que_significa_fidelidad_segun_la_biblia.pdfIn PDF document text
    • http://miwafugupek.epizy.com/janisikitifeni.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/apostrophe_use_in_possessive_form.pdfIn PDF document text
    • http://fasilew.epizy.com/45581123389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0786720c-58ea-4ce1-8b26-85717d570577/pigiperugozixowapok.pdfIn PDF document text
    • http://ledugezutixajo.epizy.com/58387260279.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/wezedo.pdfIn PDF document text
    • http://mevetilozavasep.epizy.com/askja_tourist_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ad165b5-2259-4af8-95f2-73414aed3137/chamberlain_41a5021-1f_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3217c0a-f576-42de-881d-02d47930f1d0/dujofixumibewotibotoz.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_off0000d1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F1 5856 bytes
SHA-256: aad8f9189d974773df2aba8a10b79105bdc66a5ad26f594e2f7d81b0e6fedeef
font_01_sfnt_off0000e5d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D0 10528 bytes
SHA-256: f2acaaece47d0390b240963bc8be3425e61c87fa37d1937a340756e078d977f5

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