Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda18070447b6a5b…

MALICIOUS

PDF

114.7 KB Created: 2021-04-02 09:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 354037ba9e679508c0180587ac37486f SHA-1: 2243de5479c90727bf919433b5500650385d97e1 SHA-256: bda18070447b6a5b16cef72651ee937f898af918a7ebd9dcf74d4cb7a59a4e79
96 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant portion identified as a link farm. The document body, though heavily obfuscated, suggests a lure related to 'church constitution and bylaws sample'. The presence of multiple unknown URLs indicates a potential for hosting malicious content or redirecting users to phishing sites. No scripts were extracted, but the PDF structure and link farm heuristic strongly suggest an attempt to manipulate search engine results or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/wix?keyword=church+constitution+and+bylaws+sample
    • http://fakabegapufiri.22web.org/fotuvupipekawuxofewat.pdf
    • http://nesobaka3.xyz/14714762128xk99q.pdf
    • http://falufob.iblogger.org/fadidozafa.pdf
    • http://steblin.pro/49135229903vjzdq.pdf
    • http://reform-st.ru/dura_ace_di2_disc_groupset_for_saleajdpb.pdf
    • https://cdn-cms.f-static.net/uploads/4481409/normal_60277451b5179.pdf
    • https://foluxodemebomo.weebly.com/uploads/1/3/0/7/130739593/8789575.pdf
    • https://static.s123-cdn-static.com/uploads/4422918/normal_5fddc1fda39e9.pdf
    • https://cdn-cms.f-static.net/uploads/4476577/normal_5fd63380dc323.pdf
    • https://cdn-cms.f-static.net/uploads/4369773/normal_6051f5d833999.pdf
    • http://1-bog.ru/bekuzuxolutexomujozedotaw0d.pdf
    • https://static.s123-cdn-static.com/uploads/4470553/normal_5ff13db3465e9.pdf
    • https://mixozanuzobese.weebly.com/uploads/1/3/5/4/135400893/25e72976205.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://04a80c79-134c-446e-801b-0c1635678e59.filesusr.com/ugd/5cebf8_82ed9755d3eb4348a1a624a77d9e6587.pdf?index=true
    • https://54e283d8-6946-47af-b6e3-c78582312647.filesusr.com/ugd/22cd47_b75b45de9aba40acac3dca12a9d0d02e.pdf?index=true
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_32611a55ef304ddcbbc3dfc4491cb2f2.pdf?index=true
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_6d6998efdf4d4429830249083d466f01.pdf?index=true
    • https://e3055f73-6236-423b-b810-4bc1a15f300f.filesusr.com/ugd/fa12d1_eb6a7a6886c147ed844f07308b3ec948.pdf?index=true
    • https://47ab6ce1-aee6-4086-a8e7-31fe393d2411.filesusr.com/ugd/afbef4_cd0d55856175403e8906c6951ee2db2e.pdf?index=true
    • http://vuremekewema.rf.gd/contrastive_analysis_definition.pdf
    • https://edcb5511-827b-40b0-97c1-3499c313f96b.filesusr.com/ugd/0779a3_aad9c7c7db6445fe972398ea5c8b958c.pdf?index=true
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_b68471f76ab2470180c74ff6cf69e5c0.pdf?index=true
    • http://sikofus.epizy.com/negative_items_on_balance_sheet.pdf
    • https://3f7ff619-1e23-491c-a925-ddda4d79b49c.filesusr.com/ugd/79c22a_9d88d0af5689425a8041a0c8861e91de.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001769c.bin
d2b55876f100fa6951cc35c28ed2b30cc5287a1582756e1cc0f49a882e705c61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1769C 5552 bytes
font_01_sfnt_off0001895b.bin
d64e3f91423100e564985a360ac11dbf56fec9da38e0aabf1b9ed4b2f01056ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1895B 10860 bytes
font_02_sfnt_off0001ae47.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE47 4324 bytes

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