Malicious PDF — malware analysis report

Static analysis result for SHA-256 71f78ed646630d18…

MALICIOUS

PDF

77.7 KB Created: 2021-04-02 22:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4be754c0993afe59db03feb9c8ce85e4 SHA-1: c8687d64f7518f276313d170da8a197f61974dab SHA-256: 71f78ed646630d180999767cbe3bcbd7abe45fd683facf70a580612a4579f400
166 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. It uses a password-protected-archive lure. 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 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://soxebez.ru/123?utm_term=kj+activator+for+windows+10+free PDF link annotation
    • http://fb-copyright-help-from.com/kapidalajenamawapisxjjif.pdfIn PDF document text
    • http://freud.icu/what_is_a_recovery_bible9ri56.pdfIn PDF document text
    • http://pro-konditer.com/how_to_use_antenna_with_element_tvhg99f.pdfIn PDF document text
    • http://posiximuteg.sportsontheweb.net/4886419207.pdfIn PDF document text
    • http://kotudekudoges.getenjoyment.net/international_journal_of_research_in_pharmaceutical_sciences_abbreviation.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/aitt_apprentice_exam_paper_download.pdfIn PDF document text
    • http://ganitigusawev.mygamesonline.org/dead_to_the_world_idiomatic_expression.pdfIn PDF document text
    • http://detonic-de.website/tijiledefole3sbzw.pdfIn PDF document text
    • http://italywow.pro/what_is_humanistic_theory_in_educationl0ouu.pdfIn PDF document text
    • http://viewcreditscore.info/how_to_convert_multiple_png_images_to_jpgz3s6j.pdfIn PDF document text
    • http://7lessons.website/how_much_does_boeing_engineers_makeysca9.pdfIn PDF document text
    • http://yourcy.com/otoko_ichii_ni_odosarete_imasu8t9tx.pdfIn PDF document text
    • http://milanomoda.site/duwosuxan8f0j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5e3b32e6-a537-4a58-a531-ef303a468713.filesusr.com/ugd/120874_f106037909b247b287f34246066fc104.pdf?index=trueIn PDF document text
    • http://mogixos.atwebpages.com/blockchain_in_banking.pdfIn PDF document text
    • http://kopurelotalad.onlinewebshop.net/26042447637.pdfIn PDF document text
    • https://4465b75e-e642-4f53-8c89-e22f0b9d4994.filesusr.com/ugd/ecd213_a0d966c715b5444ab40f66ecd1ef9123.pdf?index=trueIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_b365b4b0ff924b4b90bd9e11d689e99a.pdf?index=trueIn PDF document text
    • https://4e33067b-0f13-4bed-bb9c-ea95f768fd7c.filesusr.com/ugd/23924c_d975ad733e9a42f9a0fb2d702a3bba00.pdf?index=trueIn PDF document text
    • http://zudupaxub.myartsonline.com/envision_math_grade_5_workbook.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_off0000f0c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C6 5372 bytes
SHA-256: e559a75f6890eae46f4bccb8b5f05a8e8d91a2aba105911acc0028dc78fba482
font_01_sfnt_off00010340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10340 11260 bytes
SHA-256: bd2d02cb9920745bfd77aa4c895c86bccc73e28754ea13d81691271820a8716a

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