Malicious PDF — malware analysis report

Static analysis result for SHA-256 54ee4c4e8edee3ba…

MALICIOUS

PDF

68.5 KB Created: 2020-12-17 09:05:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 092f1cbddb86d9872214365eb136fbae SHA-1: d8d57e92c72917f7a8112932413e5318b6068f9b SHA-256: 54ee4c4e8edee3ba0993b7aee4de8848c922e8110e8eb43c25ab235f0ee2cb44
156 Risk Score

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 0.9972

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://trafftec.ru/strik?utm_term=maya+lee+tiktok PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459034/normal_5fb827badea0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f8bf2424876e.pdfIn PDF document text
    • https://gipivibeg.weebly.com/uploads/1/3/4/3/134341606/2664230.pdfIn PDF document text
    • https://zugozoriv.weebly.com/uploads/1/3/4/7/134770463/kizopomemabusuron.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418399/normal_5fabe966949a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f8a204db0b78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446494/normal_5fc7c65f9b1a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_5f91afecd2efc.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/467c2928-ae8c-40ab-909d-3390f5703594/ato_z_mp3_song.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93E 1604 bytes
SHA-256: d683d182ef3abab539985d31a3fc94c9a55e7e2bd9c915c21b52eec23111cc52
font_01_sfnt_off0000d14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD14E 4576 bytes
SHA-256: f7b6a9e81cb0388f730afebead1919f08099c0ddee7d9b7f8a03f1333b6f15e2
font_02_sfnt_off0000e104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE104 10868 bytes
SHA-256: d08c2ff6a96df009957503e6f6714515477a80529a76627acbf38aaaccdc1c2f