Malicious PDF — malware analysis report

Static analysis result for SHA-256 2352a7de1ebaf99d…

MALICIOUS

PDF

73.2 KB Created: 2021-04-12 09:14:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5f71c9cf2a8c894b8e7d9c0a1679ae8b SHA-1: df57cfaaf431f2a0dd9a20ff50035136922387b7 SHA-256: 2352a7de1ebaf99dc6344a2802fc7a5b679a84ec0e650c09cac1e9c60599b58e
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 0.9992

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://resalured.ru/strik?utm_term=how+to+program+genie+7055+remote PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/pufewefibuluwe.pdfIn PDF document text
    • http://negifunowulag.rf.gd/kofizejonu.pdfIn PDF document text
    • https://73099f28-10d5-4558-98a1-2f8dc61f1a2f.filesusr.com/ugd/f62eaa_835ef6b355c342d6ae46b14c9234d5b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/maxalezadasukodefepiruru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a1f1852-299a-4c49-b8bd-d2ac5afcc6c0/ts_16949_customer_specific_requirements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90d06c7b-7bc0-4811-be75-48867c12818c/numerical_ability_questions_and_answers_with_explanation_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/harry_potter_book_set_special_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/661d9ee2-c753-4d05-a1c1-9e6d7ee5857e/iso_27001_free_download.pdfIn PDF document text
    • https://6f81cef9-66a2-447d-9e1d-4c0427ef15c5.filesusr.com/ugd/4d935e_f90bcd06c75f4b5b9908789ba6460b12.pdf?index=trueIn PDF document text
    • https://0ad41a48-0d79-4d0c-b54d-a200151b25d4.filesusr.com/ugd/10b03a_722d0984b7c648a298f92235d65e9fd8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/410eec64-ea8c-4f5d-a93d-a9460f966e53/how_to_scan_document_with_hp_deskjet_2545.pdfIn PDF document text
    • https://bc3ee532-4344-4262-9f0b-d8353e2229a5.filesusr.com/ugd/6ca3f6_f54f68ee1996496bb9517f4c60997635.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/free_game_bendy._io_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/online_book_reader.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/34645338721.pdfIn PDF document text
    • http://regisebe.epizy.com/51319078583.pdfIn PDF document text
    • https://b564fea6-732e-489f-a029-a72dc6590de2.filesusr.com/ugd/6a4619_b1d7b59f236d41268831ef9134e17493.pdf?index=trueIn PDF document text
    • http://kesaratesur.epizy.com/chelsea_vs_burnley_formation.pdfIn PDF document text
    • https://2065f6f1-29fb-48ac-a230-4f4ab2d4b746.filesusr.com/ugd/b62953_52da0752bfd342d388b2129d736ca75d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/convert_fractions_to_lowest_terms_worksheets.pdfIn PDF document text
    • https://78d0a14f-36ff-4d6b-9bac-5fe2b72161db.filesusr.com/ugd/0bcf16_4ed729fad5ca4cbaa7950891abc4027e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/falejogajir/padaxeviw.pdfIn PDF document text
    • http://jojisoxig.epizy.com/5970817730.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_off0000e212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE212 5328 bytes
SHA-256: 0364d276ee8c13a7b57af383fc9e698513ef14c1efdfc1f8197167718c1fd478
font_01_sfnt_off0000f43a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43A 10120 bytes
SHA-256: da5f50e167889ba2482479d7805b0e202268ad018df6ccc9613e6ea9d3b48e2f

Open this report in the interactive analyzer, or submit your own file for analysis.