Malicious PDF — malware analysis report

Static analysis result for SHA-256 e51a442c578b7d7c…

MALICIOUS

PDF

68.3 KB Created: 2020-12-18 10:49:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4d6e8fea153c2a2414f39eb1db2e0197 SHA-1: 200f158c0d8fd6b7375c245a573a7cd56724511e SHA-256: e51a442c578b7d7cce0bc8c825de709facec7ef43b8efeb61e5fdfa39408d044
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with one prominent URL pointing to 'trafftec.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=catcher+in+the+rye+barnes+and+noble+price PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464522/normal_5fb7e3605e145.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369330/normal_5fd7bbcc73ca9.pdfIn PDF document text
    • https://gomigara.weebly.com/uploads/1/3/4/7/134727279/2315580.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5f88bb5411527.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384307/normal_5fc3d79bc3386.pdfIn PDF document text
    • https://jarofudi.weebly.com/uploads/1/3/1/4/131408364/13175f4fe132e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495849/normal_5fced1237324f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372735/normal_5f8ebfe59b5cb.pdfIn PDF document text
    • https://gizojobov.weebly.com/uploads/1/3/4/4/134436228/zepan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc360761c8c74131441d742/t/5fd0a0bb48ae4d1218061a23/1607508155322/36211754391.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/93283064448.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/vcredist_x86_2010_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78f6b9ea50d4120a246cf/t/5fd01d55ef76c20f2d3ce2a9/1607474517664/soccer_heads_unblocked_la_liga.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_off0000ccaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAF 5308 bytes
SHA-256: 97ab1fa208d162162db97f949e97c722b4a67f57006c6c8ef0d1deb2a15c93d3
font_01_sfnt_off0000deaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAF 11064 bytes
SHA-256: 782bfe7db7048fe8ff8978ed65c6ac7b61ddaa57925cd9c545a2d3d921e233ae

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