Malicious PDF — malware analysis report

Static analysis result for SHA-256 c04484befdadffce…

MALICIOUS

PDF

62.6 KB Created: 2021-02-18 03:22:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bf32c622f9f7d2dd7d3caf5e700f1a5e SHA-1: b6920161a5f5795a0326317be489f607b066d67f SHA-256: c04484befdadffce0e9b03d8c481292d6342cd3f495abf7a3d38ebeaa6d30cc1
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable domains, characteristic of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or SEO manipulation. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/strik?utm_term=beretta+m9+22lr+hickok45 PDF link annotation
    • https://cdn.sqhk.co/zexoribuj/henaiac/gubifakumiwim.pdfIn PDF document text
    • https://peminikagi.weebly.com/uploads/1/3/1/8/131856713/lebisapurebe-woxiroboni-fatulefefuxetes-goxonaxusow.pdfIn PDF document text
    • https://wabezapodila.weebly.com/uploads/1/3/1/4/131437306/kadexeninowotibimut.pdfIn PDF document text
    • https://cdn.sqhk.co/vovomafejuwa/cqiiZsP/cytosine_pairs_with_what_in_rna.pdfIn PDF document text
    • https://cdn.sqhk.co/jarebomu/csSjbhi/kindergarten_math_activities.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374178/normal_5fe3e79e0adb6.pdfIn PDF document text
    • https://zorivaleguzovul.weebly.com/uploads/1/3/4/5/134596353/nowama.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418383/normal_5fe1930dc6c11.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/ihctjbr/26020803301.pdfIn PDF document text
    • https://xuxozuxar.weebly.com/uploads/1/3/5/3/135326767/vexofos_zosujiluxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529780/normal_6018cba267dd8.pdfIn PDF document text
    • https://lugilalosu.weebly.com/uploads/1/3/4/3/134314137/b6462999b.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/VbIqkia/syfy_harry_potter_weekend_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378165/normal_602d6b736b678.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/geradi/bayshore_waterfront_park_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/nurojevefu.pdfIn PDF document text
    • http://woduzubede.epizy.com/ms_drivers_license_permit.pdfIn PDF document text
    • http://gitavini.epizy.com/jimolavutasirozu.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/gedesubuzefaxi.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_off0000b9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9BB 5472 bytes
SHA-256: f000b788f99ae9f786a120d6d304d3a9316012a9d194032e31f1cf13b8cbd4d8
font_01_sfnt_off0000cc33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC33 9732 bytes
SHA-256: 8dead6b579a32730ca1473967015c946e7d7425f5ad1ac3e45467bf23ff1acc6

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