Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad1833ffe10dff8…

MALICIOUS

PDF

81.2 KB Created: 2021-03-20 18:41:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6cf0ee0503585c9daf0bbc7f171278e4 SHA-1: 23287b6e736bd38035d11a8e43b7c0a30e936f87 SHA-256: 8ad1833ffe10dff85bc9d6c03a2ad14cf533e63f6c6afa20ef83a078b6d8e16a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. One of the primary external URIs points to 'mezovuduw.ru', which is highly suspicious. The document body is heavily obfuscated, but the presence of external links and the overall heuristic firings indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/strik?utm_term=why+does+transcendental+meditation+cost+money PDF link annotation
    • http://bositozibab.getenjoyment.net/71679620303.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_60401600d7f40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408004/normal_604073705c0b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446924/normal_6025f34b2e487.pdfIn PDF document text
    • http://tenipimutav.mywebcommunity.org/47171782595.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459929/normal_603d545034a93.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5405d108-7f1e-482b-a10c-e06f62b7505d.filesusr.com/ugd/d941b1_3a98224ccbf449de8c3094e9f284d486.pdf?index=trueIn PDF document text
    • https://8035c368-62b5-4e0f-b07c-73fd2baf85c9.filesusr.com/ugd/2ee8d4_7cfa8e6aac5c4d7f8bfcb45f1897a96c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zamuriza/86662457718.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/c_abstract_class_vs_interface_performance.pdfIn PDF document text
    • https://e9abb47e-19e5-4ec2-9f3c-2aa4e6f2bf0a.filesusr.com/ugd/92be99_fb6a55552509416fbf8ad6b01a76041b.pdf?index=trueIn PDF document text
    • https://305aa2e3-e1d2-413d-aa2e-f1bb83d03ded.filesusr.com/ugd/92ee2b_6622ea97cbc141e495b655cc670bf55f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/012c552f-2758-44c0-b494-457321d649aa/jazojabajomuxazupil.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/broadsheet_coffee_sydney_cbd.pdfIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/athletic_training_books_barnes_and_noble.pdfIn PDF document text
    • https://9a2ac3f7-8316-4342-9d28-a75bb8d545bf.filesusr.com/ugd/599026_a6c637e03206456287aa6c54223f6ddc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pisedij/7213305239.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/cookies_google_chrome.pdfIn PDF document text
    • http://bugazepoja.onlinewebshop.net/zokinukoriwelem.pdfIn PDF document text
    • https://f55c6975-0091-4942-a106-dc80285e5f9d.filesusr.com/ugd/8a4248_ae609ef5acd0489e93f92ca48b92e57c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/52b430d1-4bde-45ca-8e65-66f5c8aceffa/how_much_do_i_need_to_start_a_bakery_in_nigeria.pdfIn PDF document text
    • https://c4a5d104-04f9-44e6-b03f-1f5edac3680f.filesusr.com/ugd/f23921_fd8f3ecdfab94a3ea4f37b8a583a7229.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4A 5292 bytes
SHA-256: 61d4a0e3ba44bf62a0b38d1739a9e813b8e3600d8eee509c64db7ac5a582fcf0
font_01_sfnt_off00010e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E31 11640 bytes
SHA-256: bacaa892a3afe4e8ec37a0e1816f50a2c2711e36129db239776fc2c0871cee95

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