Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dd211e186ef0fbe…

MALICIOUS

PDF

503.1 KB Created: 2021-02-25 20:25:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5ad743ea51f873a88a5137f574168420 SHA-1: 1e667f92cd73325019c683f7a24f8167e6618467 SHA-256: 8dd211e186ef0fbeb9ce165120f129d5fc0fe3b9d2d5e291f223e7979f6845ca
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that leads to a suspicious domain, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to reference academic content, likely as a lure. ClamAV detection and ML classification confirm the malicious nature of the file, indicating it's likely a phishing document designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8400

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://bologen.ru/123?utm_term=statistical+mechanics+of+complex+networks.+reviews+of+modern+physics PDF link annotation
    • https://cdn.sqhk.co/sulugedako/6tgjhib/38870781327.pdfIn PDF document text
    • http://eroganoficial.site/what_is_subordinating_conjunctions_examplesnp0l0.pdfIn PDF document text
    • https://cdn.sqhk.co/rezeribevi/kidumDx/xofedelotobus.pdfIn PDF document text
    • http://lebizifijafaxim.medianewsonline.com/mecanica_vectorial_para_ingenieros_estatica_10_edicion_beer_espaol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482617/normal_5ff8b2decf55c.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/tjiiiCG/lubemibevedukazuvugev.pdfIn PDF document text
    • http://formblckr1.xyz/fatomimefarubixawekanekadn6i4i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461777/normal_602e2d07cea05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365621/normal_5fe22fb5ed000.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387709/normal_5fcfadc27e759.pdfIn PDF document text
    • http://vamoktin.ru/486646262902hbh7.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/ejercicios_de_ecuaciones_de_primer_grado_2_eso_con_soluciones.pdfIn PDF document text
    • http://dwatches.site/306749011533vh1i.pdfIn PDF document text
    • https://cdn.sqhk.co/mekoposa/jjdgchd/vabarer.pdfIn PDF document text
    • http://bestgirl69.com/burp_suite_cookbook_downloade179e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nonipesikiri/avatar_movie_1080p_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/dawn_of_titans_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/case_information_statement_nj_child_support.pdfIn PDF document text
    • http://kepofif.onlinewebshop.net/tulajolinojonusi.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/instax_mini_9_settings_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00077d6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77D6A 5704 bytes
SHA-256: 2fb2e052994d511710b5247172b4d04489acfe152c7a7a9701e0a59fa607f3e7
font_01_sfnt_off000790c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x790C7 12808 bytes
SHA-256: 219e90482b2f759ad67ae1339e5e91ad43f618dff77373ccdef5fa5bbe0ebd47
font_02_sfnt_off0007baff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BAFF 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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