Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2deffd5f02d7492…

MALICIOUS

PDF

90.4 KB Created: 2020-12-17 17:46:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5b9ed5e540068d71881ae3c98331ecc3 SHA-1: 156b307b8e0412ac165128b146bc59abd6627d90 SHA-256: d2deffd5f02d74923f5184a8b0978b21b449acaad4fa6e9b6ec329071f68b21f
156 Risk Score

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 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 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafftec.ru/strik?utm_term=downey+movie+theater+showtimes PDF link annotation
    • https://jumozavuna.weebly.com/uploads/1/3/4/5/134598597/e8d7e1454f9600.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf1451e0-8e4d-40d3-998f-eda4d99b27a4/9781082303.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc707bf717a0f60c4010a14/t/5fcb1b747ab0f364aba6eb02/1607146362324/mini_golf_courses_open_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/borrowing_meaning_in_balance_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d20b98b-e27f-4c79-8e14-af1328fe09cd/holt_handbook_second_course_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/ccma_form_7._13.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/kavat_gummistvlar_barn_storleksguide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/732cca5d-e23f-44ba-8c34-fe67ff7711c7/you_hear_abramos_la_tienda._you_choo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c996bc1d-7e18-4e7a-bb0d-a0807e9305fc/81157036660.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/barcode_font_code_128.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b28e2cf-8273-4019-9b63-a463530d7cf8/90274717103.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/607e47a4-bb82-4fc2-bc48-5cd5ff061b74/lizardman_shaman_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/couch_to_5k_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c67deb1f-4fcd-43de-94c7-35bd6326e124/uat_testing_script_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57202b8467722f1f27178/t/5fc90c7c6b32ff73850b0736/1607011452727/ant_colony_starter_pack.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_off000126e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E5 5148 bytes
SHA-256: ab852d250a0c32e1662010eb429da7d14d93bceedaeb254cc51c14beb85ffd62
font_01_sfnt_off00013856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13856 10736 bytes
SHA-256: 8fed4b38391f7640515c633dc8724aa969e94d186e1d01f9ae76df5fbaedb74e