Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd29d092fd7cefd7…

MALICIOUS

PDF

75.5 KB Created: 2021-02-22 03:45:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f7c1a92fe3b95d3801a59aa8f183f1fe SHA-1: 90a79f6e3b2a63736c2e55b2919051406888ea3f SHA-256: dd29d092fd7cefd7cef89d0f6efaa5c3310b3a1a6a8312f51cee0e5f436133ba
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://maypoin.ru/wix?keyword=vibrating+tongue+ring+batteries PDF link annotation
    • https://cdn.sqhk.co/xovikojux/gexgeb0/81573496935.pdfIn PDF document text
    • http://tulakijumipad.22web.org/xexunaduvuzelilezemi.pdfIn PDF document text
    • http://freshnatur.fun/23583744415kx393.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/hhgeZih/99949775911.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384045/normal_5feba8d9caa4a.pdfIn PDF document text
    • http://tovarajuxelogag.iblogger.org/bijifapewejek.pdfIn PDF document text
    • http://tacfitproducts.com/60360727873d3y11.pdfIn PDF document text
    • http://astrohelp.space/account_form_4zp0yq.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/fjiHAjb/free_font_generator_cursive.pdfIn PDF document text
    • https://cdn.sqhk.co/venitalobeni/bptgEjf/87281783624.pdfIn PDF document text
    • https://cdn.sqhk.co/tosijoxopum/gdCbThb/best_world_war_1_flight_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/dexediwiboze/awfhgha/5239020052.pdfIn PDF document text
    • http://mobokem.iblogger.org/dibujos_para_colorear_de_paw_patrol.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/iRliicS/nipapebigosu.pdfIn PDF document text
    • http://wimazosuwoxugij.66ghz.com/ebook_cookbook_template.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwasokeg/FihqKut/lezazexowomos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447265/normal_600261e2afb95.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fiwipofel.epizy.com/central_pneumatic_air_compressor_parts_92504.pdfIn PDF document text
    • http://xulivef.rf.gd/national_5_chemistry_calculation_questions_and_answers.pdfIn PDF document text
    • http://gifimedirawi.epizy.com/sheetrock_acoustical_sealant_precio.pdfIn PDF document text
    • http://lilepav.rf.gd/alphagan_davis.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_off0000ea7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7F 4924 bytes
SHA-256: 5fb97abccc6d9a31da6766a09d38ca2c8751252006c96b0c25f15ec645704909
font_01_sfnt_off0000fb51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB51 10824 bytes
SHA-256: 149eb2b2975271e7eeedbe4d8d0a4ce8f38cee1414d68a9861e3a5170493b0b7

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