Malicious PDF — malware analysis report

Static analysis result for SHA-256 043e1ef340c932ba…

MALICIOUS

PDF

66.1 KB Created: 2020-11-25 12:10:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0cb255db3e0f441e0397444bc183aabe SHA-1: d09c56a6ce2889772f9e5626c8221b7bcded1697 SHA-256: 043e1ef340c932ba8576ee75e849441b47c80fac1afbbed15a69c1780a971d0a
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 0.9995

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
  • 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/strik?utm_term=presto+cool+daddy+elite+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369498/normal_5fb4fa74b4c68.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/c04dc84919bdfb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383170/normal_5fa8545ac8c0a.pdfIn PDF document text
    • https://falibapop.weebly.com/uploads/1/3/3/9/133997194/2311541.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409243/normal_5fbb04aed29ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379611/normal_5fa445c878154.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410983/normal_5fbbdbe855328.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388620/normal_5f93e44fc850a.pdfIn PDF document text
    • https://rewazifepa.weebly.com/uploads/1/3/4/6/134664269/199333.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/wonoti/greenhouse_effect_and_global_warming_in_hindi.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_off0000ba8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA8E 5188 bytes
SHA-256: b94828caff4f8cbb669534c04727b36659954f139d0099b7791331c6ca5c59d9
font_01_sfnt_off0000cbec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEC 1488 bytes
SHA-256: 3d1ee4664cdd500a55ad384b4897916d00581f0f17b0dcaf6096c27c885a4e0d
font_02_sfnt_off0000d3eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EB 11696 bytes
SHA-256: ed235c68627f5e6e6f107fe870f2d2b5ec696a1c116718a6b0a6e34432a94082