Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d8574c7a5dd859…

MALICIOUS

PDF

78.1 KB Created: 2021-03-18 00:30:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5f8d5c29e13333eef4e3c4e593889ffe SHA-1: 899350737e9cc998baa12718d4d41ab6353aaedd SHA-256: d8d8574c7a5dd8597f7fe25e5c3442e07b0bafa873d85c79fec5c8d64c1d315a
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 0.9993

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://midufefew.ru/wix?keyword=polarity+worksheet+with+answers+on+preposition PDF link annotation
    • http://bejegom.22web.org/fidevojerenifuvatal.pdfIn PDF document text
    • http://xajuguzim.iblogger.org/16263903175.pdfIn PDF document text
    • http://vaxisezawoged.scienceontheweb.net/microscope_function_quiz_answers.pdfIn PDF document text
    • http://bibeponuvizozu.iblogger.org/definition_of_bipartisan_campaign_reform_act.pdfIn PDF document text
    • http://borejukeluteva.mygamesonline.org/geguwulasel.pdfIn PDF document text
    • http://fanutoragozogow.sportsontheweb.net/boluloravus.pdfIn PDF document text
    • http://rijupoxog.22web.org/anatomy_for_3d_artists_3dtotal.pdfIn PDF document text
    • http://loginenujivaj.iblogger.org/kenwood_tm-d710ga_software.pdfIn PDF document text
    • http://degitowexara.iblogger.org/zebco_404_vs_33.pdfIn PDF document text
    • http://pazolozul.mypressonline.com/fisico_quimica_atkins_portugues.pdfIn PDF document text
    • http://rimisirotox.iblogger.org/whirlpool_duet_front_load_washer_door_locked_flashing.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tifilumiteva.epizy.com/catalogo_avon_campaa_18_2019.pdfIn PDF document text
    • https://c5c27394-2042-4749-9b39-d1c24dcbd9f0.filesusr.com/ugd/e9b987_9843392be8cb463e9ca6931fd4e6dbd6.pdf?index=trueIn PDF document text
    • https://245ae9ba-e923-43ed-bc11-30ed5d1acd78.filesusr.com/ugd/051519_4da2b01a192443e192b5c0d5fadc0420.pdf?index=trueIn PDF document text
    • http://faxiwig.epizy.com/cerebral_venous_sinus_thrombosis_patient_information.pdfIn PDF document text
    • http://virilos.epizy.com/the_case_against_corporate_social_responsibility.pdfIn PDF document text
    • https://9e7b01ce-91ce-414a-93c5-ade8df4b7359.filesusr.com/ugd/cfbfd2_df5f340ce05a408886880a39117ecd17.pdf?index=trueIn PDF document text
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_c686778f87784ad7b8061bdde865909c.pdf?index=trueIn PDF document text
    • http://ziwemasux.myartsonline.com/harbor_breeze_ceiling_fan_remote_settings.pdfIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_94a06eaa03bd44b1bb0e142c6efb74b6.pdf?index=trueIn PDF document text
    • http://wolevovugubim.epizy.com/reformas_borbonicas_economicas_en_el_peru.pdfIn PDF document text
    • http://bitibidebizofu.epizy.com/12171927964.pdfIn PDF document text
    • http://taxifegizuni.epizy.com/kawugiko.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_off0000f35a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35A 5164 bytes
SHA-256: 5153c4b1842d635609b21e898d6016594d62b9665ee458dbc98f3584c1089aa3
font_01_sfnt_off000104f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F9 11600 bytes
SHA-256: 7ed3d99cba5507854dfdbe311c75f0a2a7ddf20a75767e00b655dad90fba85bc

Open this report in the interactive analyzer, or submit your own file for analysis.