Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e577ad6c871b7df…

MALICIOUS

PDF

78.2 KB Created: 2021-03-29 13:40:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: cfa595d7aaf718a919b0af3f6012bd35 SHA-1: cf82ac206330afe945724c46098b1ae720fbdbd9 SHA-256: 7e577ad6c871b7dfc05def46db4bd4362b887c189204926db40a7bec50a39380
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs pointing to suspicious domains, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://soxebez.ru/wix?keyword=tub+tapper+apk+mod PDF link annotation
    • http://polfact.site/31179043197yg4q3.pdfIn PDF document text
    • http://ketousa.site/pogil_activities_for_high_school_biology_photosynthesis_answer_keyn1ucx.pdfIn PDF document text
    • http://apeech.ru/64004071820cdgnu.pdfIn PDF document text
    • http://vzruvayarttraff.xyz/53096433285li074.pdfIn PDF document text
    • http://rankingcoach-seo.com/9square_for_instagram_apkswcmx.pdfIn PDF document text
    • http://tesar-krd.ru/folikidilapinurapixeljs.pdfIn PDF document text
    • http://wgathering.org/how_to_reset_viper_alarm_systemxp31p.pdfIn PDF document text
    • http://899themes-demo.ru/someone_like_you_chords_easy_guitarkffnh.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/gowupuzokowuxes/black_labor_white_wealth_by_claud_anderson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21e2aa67-f285-4c94-9f1b-68a27e1a594c/53343497813.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/ejemplos_resueltos_de_funciones_trigonometricas_en_la_vida_cotidiana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdc5a9f5-0eaa-4f54-adef-1d8db4950339/38671167887.pdfIn PDF document text
    • http://wikidupuzok.epizy.com/examples_of_abstract_in_a_lab_report.pdfIn PDF document text
    • https://99b08629-27b2-41dd-83a1-938dc2ca35bd.filesusr.com/ugd/067ecb_e9597d1b8de44c1e8ea934a78a8ace09.pdf?index=trueIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_47e15dbd7b3544f5a697f2e040ef8890.pdf?index=trueIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_e3486085b10a4f3491e41843f734682d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e18fa44-3955-4c34-9f3d-73a48f19d1ca/duwurugexadipevidadapu.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/1616375362.pdfIn PDF document text
    • http://derazikabulode.epizy.com/free_autocad_2020_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c705bb5-c76c-4b3b-a3b1-fc82cf3ca0a8/52044271625.pdfIn PDF document text
    • http://pasibujaz.epizy.com/15850199779.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/33747013172.pdfIn PDF document text
    • https://f171294f-ed7a-4884-a773-1e826a512430.filesusr.com/ugd/20d861_eb71e78e8d3e445da67d16c736302cce.pdf?index=trueIn 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_off0000f40f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40F 5048 bytes
SHA-256: 27defc10d1544700e4ab3ccf43fcf6b80a0e556d3fc408ec3dd7bd6775820603
font_01_sfnt_off00010525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10525 11268 bytes
SHA-256: 413c995716d75fb0836a251d4274df3b07479bf43ffbc7fc6dc1973e89450866

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