Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d1d961b869ca36…

MALICIOUS

PDF

77.8 KB Created: 2021-04-08 03:37:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9a17851b17e42296e997d9e24236c14 SHA-1: eb91715dc192ea6e83c9a75f5df887fcfdd9e9ae SHA-256: e4d1d961b869ca36e0895aefeaf31d6b9fa601bb675c7d76accf06dc2c1a37e3
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, characteristic of a link farm, with the primary URL being https://soxebez.ru/wix?keyword=tanyell+waivers+ma. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest an attempt to redirect users to potentially malicious content or phishing sites, aligning with a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://soxebez.ru/wix?keyword=tanyell+waivers+ma
    • https://vokubopupabilu.weebly.com/uploads/1/3/4/6/134691430/sukeme.pdf
    • https://doxekitonibi.weebly.com/uploads/1/3/5/3/135326555/1728386.pdf
    • http://feviziwomuta.iblogger.org/37122678706.pdf
    • http://fuxezaboxekave.scienceontheweb.net/77259740136.pdf
    • https://nofuzuvovakiba.weebly.com/uploads/1/3/1/3/131379181/2a4032.pdf
    • http://kalowodopole.mygamesonline.org/23070079441.pdf
    • https://xagapetudiza.weebly.com/uploads/1/3/4/6/134686513/gabulosuzimis.pdf
    • http://leledup.mypressonline.com/85057911335.pdf
    • http://wanezus.scienceontheweb.net/blood_type_a_food_list.pdf
    • https://zuxorubijif.weebly.com/uploads/1/3/2/6/132695980/23ecccfd8dabb7.pdf
    • https://telutifezidawu.weebly.com/uploads/1/3/4/6/134624569/bisolir.pdf
    • http://jevafurevozu.mygamesonline.org/63091012407.pdf
    • https://sopodepewujo.weebly.com/uploads/1/3/4/3/134340903/kakikig_jogapoxoso.pdf
    • http://selolaz.66ghz.com/nolezolojaromogas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bolilolu.epizy.com/ashampoo_burning_studio_2013_full_version.pdf
    • https://790985df-dfec-4a08-b509-00f37668cf87.filesusr.com/ugd/a421e3_b7f6dc4b9ad84da09bbaca8426d8e03f.pdf?index=true
    • https://2d841ef3-a248-4e6a-996b-2d54d6713fdd.filesusr.com/ugd/1decf9_1c340ebfdfe34cfaa0f2c96eae7460f2.pdf?index=true
    • http://dokudaruriwiv.atwebpages.com/professional_biodata_format_for_job.pdf
    • https://e57d8632-f742-4524-ada6-9cdf759d9f13.filesusr.com/ugd/b0cb2d_70bbceede6f54e5bb3ffd35f87671878.pdf?index=true
    • https://91e55214-10ad-44cf-a10a-60a9392df58b.filesusr.com/ugd/e1c37d_df72f408e90c451eb34ab42512d9f57e.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4a0.bin
ac2f8b981bef871c81d5c5a9d429c22d4a79a6c701bb3138d8a95cadde7a94cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A0 5036 bytes
font_01_sfnt_off000105c7.bin
c0d511cc58a86ff39c4dd45837ef9a4fa43f5d46b5fc5803d370523a58b8f4ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105C7 10752 bytes

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