Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e275bf3b31277f3…

MALICIOUS

PDF

657.2 KB Created: 2021-03-19 21:04:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 88ebdb1b6b4004b94342403c3d320f50 SHA-1: da9d6f4c9f6b74bcb1e117130e9c5412718b88b0 SHA-256: 1e275bf3b31277f32661c79a2ed8901b1bdafb00561c2646d48afd34cc282caa
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'seumenha.ru', which is likely a phishing or malware distribution site. The document body is heavily obfuscated, but the presence of external URLs suggests an attempt to redirect the user to malicious content. No scripts were extracted, but the PDF structure itself facilitated the inclusion of the malicious URI.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8190

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://seumenha.ru/123?utm_term=dominions+5+ea+caelum+guide PDF link annotation
    • http://fredo.bike/frances_gramaticaqfc4c.pdfIn PDF document text
    • http://libralab.digital/that_evening_sun_commonlit_answers0ch07.pdfIn PDF document text
    • http://smeh-mif.space/toro_timecutter_costlqgc7.pdfIn PDF document text
    • http://avtoshtorki.shop/how_to_write_a_news_article_exampleborvf.pdfIn PDF document text
    • https://cdn.sqhk.co/ronofumito/NjbAD9q/fejusavalasasugawitoxida.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451230/normal_5fca07c9e22f8.pdfIn PDF document text
    • https://dakuwiremab.weebly.com/uploads/1/3/4/9/134901294/2025368.pdfIn PDF document text
    • https://cdn.sqhk.co/rawewosit/icn40hh/bubble_tea_recipe_white_tapioca_pearls.pdfIn PDF document text
    • https://gutavavoz.weebly.com/uploads/1/3/4/0/134000423/dulotomejalesak_fesaduj.pdfIn PDF document text
    • https://xedawazusaxe.weebly.com/uploads/1/3/2/3/132303108/vogadomumofisig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464877/normal_6010660feb89e.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://b133b025-67d1-4190-9e53-fbb99503dec2.filesusr.com/ugd/caf13f_25086f93e0054726ba8586bd3cf2a671.pdf?index=trueIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_a2c2d1fd015f4fd6b86ec58cef5ff3c8.pdf?index=trueIn PDF document text
    • https://8488b7ac-84bc-45ae-88ed-26841205fc59.filesusr.com/ugd/7cda3c_1f2da416ca1e4dd7b257e4b8dd1b7d93.pdf?index=trueIn PDF document text
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_adddbd83d4d54dc1a03f5290a02c06e6.pdf?index=trueIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_c75c74d2c8b348daa73ae294911c8eec.pdf?index=trueIn PDF document text
    • https://a9f3490c-def6-45ea-9957-aefa341d54bd.filesusr.com/ugd/84b587_c86ae7b828134b1c8b5d9aedd2103f1f.pdf?index=trueIn PDF document text
    • https://ff743420-c5e2-4527-a456-70ddb2a1abd8.filesusr.com/ugd/5178f2_0c4e78ad18f641a3b512f0873a63499f.pdf?index=trueIn PDF document text
    • https://696f1bd8-06c3-47a7-a8f7-e83e17ec8d18.filesusr.com/ugd/5ad03d_7b1d7ddbb061496298b71ea0c5e1c8f1.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0009e789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E789 5088 bytes
SHA-256: cca66614249a5111b09d4788d957bf4a969bba565e368c619309ed88f118933c
font_01_sfnt_off0009f8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F8B4 13052 bytes
SHA-256: f772523c189f25cd24a4cafe553f27dc4f3c75306bd4916831c763f3a0aa73f8
font_02_sfnt_off000a2472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2472 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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