Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ebded121f2a2b41…

MALICIOUS

PDF

71.1 KB Created: 2020-12-09 05:09:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9a0c08f81e0900a52226cfc994d429a4 SHA-1: d0213269a4673206b886bc3ee6ea6c0d96da29c1 SHA-256: 2ebded121f2a2b4107553a8dfb7c833f7945f0b6403975f3243b84813507ce86
214 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=itliong-vera+cruz+middle+school+union+city+ca In PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/1948383.pdfIn PDF document text
    • https://sebonegipuwi.weebly.com/uploads/1/3/4/1/134108682/7053595.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/jlpt_n5_listening_practice_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/neonatal_guidelines_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76db42f4-6e50-45bf-9154-8366741fc009/jerebomawoluberixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/535193a4-d89c-486a-be33-288d5b0dea96/pokemon_stadium_2_usa_rom_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bb6a788-aa0d-4acd-86b4-275d525681cc/60641945220.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39253cbb-323d-438b-b6a5-bff746e6ea54/57571631153.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c9b1a5bc066edfa528b7/t/5fc53dbf9ee0f32b87fef7e4/1606761921680/vulajubudorebidoraxu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2aa6b5687f52b6b8c813a/t/5fc79ef948d5672cfb44952f/1606917889652/2020_election_prediction_map_latest.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D6 5532 bytes
SHA-256: ccfff010af4198557153839b0556c600e30b060123f85ee38c2fd4807b0a08dc
font_01_sfnt_off0000d39c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39C 11220 bytes
SHA-256: 91ba1b260985d6c7af89d67f3bb4996474e1de63a0f1d0a9200dc99efd53ea49
font_02_sfnt_off0000f9e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E4 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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