Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b0dff73fe603045…

MALICIOUS

PDF

85.4 KB Created: 2021-04-02 19:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a7b833b30a7fcc7e444836a3096b8393 SHA-1: 5a97df55ca5ff2add3bff5efcd95ec768f7c03d0 SHA-256: 5b0dff73fe6030457a56aba7441f5951cd6b148520e2a2b6983bc11fe95edf1d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=paper+shredder+user+manual PDF link annotation
    • http://alex-chekalev.com/30148530816nrrgy.pdfIn PDF document text
    • http://znalomstvavip.site/kizokixutulibijuseytp5r.pdfIn PDF document text
    • https://tusuwijajibu.weebly.com/uploads/1/3/4/5/134517525/4722153.pdfIn PDF document text
    • http://rankingcoach-seo.com/android_simple_cursor_adapter_imageviewc9wnd.pdfIn PDF document text
    • https://zezuwosizu.weebly.com/uploads/1/3/4/4/134459619/jaxosevubakog.pdfIn PDF document text
    • https://fineruliji.weebly.com/uploads/1/3/4/3/134313455/pivoguwi.pdfIn PDF document text
    • https://zodixezujiz.weebly.com/uploads/1/3/5/3/135345824/4136096.pdfIn PDF document text
    • https://gatikewud.weebly.com/uploads/1/3/4/3/134382011/towogonomimesa_pitizezam_javidizubezipus.pdfIn PDF document text
    • https://wimazuwog.weebly.com/uploads/1/3/0/7/130740080/10e80e4a8a2835.pdfIn PDF document text
    • https://bakijowo.weebly.com/uploads/1/3/4/7/134726649/1511025.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bawilifugoxak.epizy.com/vojujipajuko.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/fegibukagukesaguvuwazezi.pdfIn PDF document text
    • http://kegapijev.rf.gd/cloud_9_cast_now.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/nesa_accreditation_supervisor_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/que_es_la_cabala_judia.pdfIn PDF document text
    • http://rilulavonepuv.epizy.com/27004395706.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/are_the_books_of_the_bible_in_chronological_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaa8bd5f-ddba-43fc-be3d-7368ccf1ac3e/mazuwazofopoxaroxagijoluw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/289f34a5-8faa-4e00-936d-e93f417d4b98/microsoft_word_document_formatting_essentials.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83662b46-0055-4908-8629-44f926641159/sad_song_we_the_kings_piano_notes_easy.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/best_instrumental_background_music_free.pdfIn PDF document text
    • http://wafidifu.rf.gd/how_do_you_reset_an_electrolux_washing_machine.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A7 5200 bytes
SHA-256: ae40a18e1f823d58f0fe9de6a00dac679b482467b40b12e9f713d39b67bbca77
font_01_sfnt_off00012322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12322 10984 bytes
SHA-256: 9afd1f40ba5f636224b347a4caa254a21f9b59c9316e79dde4a1e2d54608fe60

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