Malicious PDF — malware analysis report

Static analysis result for SHA-256 311f0591d6b5833e…

MALICIOUS

PDF

57.4 KB Created: 2020-12-05 06:26:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e979311bd4c04d298a09ce35cdfd559b SHA-1: 299b49759e85be7d97fe9ea2929b5577abc493f7 SHA-256: 311f0591d6b5833e2cada150392e106957bd3894d5e1c66e261ba43a05e29491
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/123?utm_term=kim+jin-wook+kbo PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/broward_county_tax_appraiser_office.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e15d7d0c8f249d40b1da/t/5fc2bd7d3485235c8620d59b/1606598015343/no_call_no_show_warning_letter.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/sufimelu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc124912e34347c70458bc4/t/5fc6ea383ac9c763f4c8a6de/1606871610686/mexaseb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/246f08a6-dac2-4a1c-9863-4e785cf6efe1/guzipisolaxuzivova.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd08152c6de34c7a3a545e/1606223894197/xiwaxotegatenijuruzuvaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dc89e1f-dd79-4deb-8203-d7b5ac364527/how_to_spawn_a_griffin_in_ark.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfff329c5e26690264741/1606221812409/sabutitaperinejalefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/301da90c-e8c7-4e37-84a2-e7baad19e11c/spanish_guitar_tabs_easy.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28d360b6b03258f4005db/t/5fc3f0353485235c863fe509/1606676536115/zevogidixajeregutu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e90c27a199023ab56552/t/5fc1e9fbcb3e0f577195086e/1606543868404/35780800848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f46c1003-ab7a-4380-a004-0d0db3ee260f/chase_money_exchange_euro_currency.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_off0000a9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9CD 4688 bytes
SHA-256: 04803703f18d83000fc2c777f0408aa80590e214100a238e76a1839429dcbd7f
font_01_sfnt_off0000b9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9CD 9220 bytes
SHA-256: f92c460b7e660297f0b96673a8effee416e89081348dfdfe9512aaebd9da2c02

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