Malicious PDF — malware analysis report

Static analysis result for SHA-256 741f61bf8ef62c26…

MALICIOUS

PDF

65.2 KB Created: 2020-11-24 07:56:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1f4657c3e5ff7c5b309dc97f910df152 SHA-1: 4311aed159879a74baed7290b2cbc293c4241425 SHA-256: 741f61bf8ef62c26afcdf7c237dca280e0b439f272cfc5f0eaa1a8cb0c628b0c
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 0.9997

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://trafffe.ru/strik?utm_term=filme+a+corrente+do+bem+dublado+baixar+gratis PDF link annotation
    • https://dunabosugetagek.weebly.com/uploads/1/3/4/6/134601841/4e98603f2bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379045/normal_5f9618bf4f313.pdfIn PDF document text
    • https://zagukosi.weebly.com/uploads/1/3/4/3/134314994/1025147.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377388/normal_5f8b2e392be7c.pdfIn PDF document text
    • https://xulopoxaxuwuzoj.weebly.com/uploads/1/3/4/5/134509354/14cc6f2396.pdfIn PDF document text
    • https://vexapezerizerup.weebly.com/uploads/1/3/4/7/134717078/7ea41.pdfIn PDF document text
    • https://fugunukotuji.weebly.com/uploads/1/3/4/5/134589730/xiratefug-xubavur.pdfIn 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/fcfbf36c-8241-418b-ab0a-76f9216dd25c/81645822785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c43afdd-8cb4-4019-9a76-487a5877fe55/33934162967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d48076e-9a4a-490d-9917-59fe95975bc8/zagalagepowirosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2133a31e-f51a-4717-870b-b72963d54330/bosorubudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82263d95-c986-40ec-b7fe-08d686b0f531/fusinububakaxap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3123456-cbe0-4f7b-8a51-d8a85b028adf/81777052380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc76595d-7eeb-4cbc-8bf5-2cf9b8ee73b3/98501449407.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_off0000bacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBACB 5424 bytes
SHA-256: 3a571562968281cf63fa72e24e6f2dcfbec80c6ffcb01dcb5088ed386f776b22
font_01_sfnt_off0000cd25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD25 13508 bytes
SHA-256: fe9e2ee7a523b12f57d3c4cb89a89ad873ff6fff5e72ad7b3549acd8b30eb99a

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