Malicious PDF — malware analysis report

Static analysis result for SHA-256 340e7198cc30ad0f…

MALICIOUS

PDF

82.0 KB Created: 2020-11-24 11:10:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1dc7e9eec85089d12b97187e93db0f86 SHA-1: 02e2b600171122adfd562c15cc728639771dc6de SHA-256: 340e7198cc30ad0f733e1ea32d09186e5a4d299072ddfbb276e16731525019c1
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of external links, many pointing to PDF files, which is indicative of a link farm or SEO abuse tactic. The document body, though heavily obfuscated, contains text suggesting it is a manual, likely a lure to encourage users to click on the embedded links.

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://traffset.ru/123?utm_term=nutribullet+balance+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407807/normal_5f950c4a7e24e.pdfIn PDF document text
    • https://kupanonul.weebly.com/uploads/1/3/4/6/134682697/duvijodetan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462354/normal_5faa18c193dc1.pdfIn PDF document text
    • https://gokimojesip.weebly.com/uploads/1/3/4/5/134595710/2f7d05af0d360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464330/normal_5fa4912bcb056.pdfIn PDF document text
    • https://pipumemudif.weebly.com/uploads/1/3/4/8/134866913/3475510.pdfIn PDF document text
    • https://sebezudo.weebly.com/uploads/1/3/4/0/134042436/gedese-toxagure.pdfIn PDF document text
    • https://repenakexo.weebly.com/uploads/1/3/4/6/134600143/ef4b6.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/pizivurapab/fill_in_character_sheet_dnd.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/random_text_message_with_uber_code.pdfIn PDF document text
    • https://s3.amazonaws.com/wifozuxeku/93436760376.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/termination_letter_template_from_employee.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_off00010721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10721 5232 bytes
SHA-256: 74ace33af49f0b949a3284366424e9cac597f6e824143984329fa30263e54025
font_01_sfnt_off000118d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D9 10168 bytes
SHA-256: f9c35fde085fec80f5f32b65d76762972a53a9d21491cc89bc1dcb95488ddb4a

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