Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a7808e61c1e890…

MALICIOUS

PDF

76.3 KB Created: 2021-03-19 06:53:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aefa080882534ae1b55ebd146563453a SHA-1: b6b43b0b97563117c4bd98efb172455188b3ed0a SHA-256: 76a7808e61c1e8902f858ffb591d2cd160a8ed2ca07b71b3aabd91df92eed3b5
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external URLs and the PDF_SEO_LINK_FARM heuristic suggest the document is designed to redirect users to malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/123?utm_term=label+template+21+per+sheet+avery
    • https://nabivedoki.weebly.com/uploads/1/3/1/4/131407492/dazonoziduxeti.pdf
    • https://raguwagoneneza.weebly.com/uploads/1/3/1/3/131384547/najoned.pdf
    • https://nivakodet.weebly.com/uploads/1/3/4/3/134330266/zilizaxetilaxe.pdf
    • https://pezujotage.weebly.com/uploads/1/3/4/3/134318684/kolap.pdf
    • https://cdn.sqhk.co/tavanaru/EmThhig/56423252122.pdf
    • https://xilamexazoleguj.weebly.com/uploads/1/3/2/6/132695560/ec4943f72.pdf
    • https://gazufapojekivu.weebly.com/uploads/1/3/4/8/134890592/840cfb25e1.pdf
    • https://dujuwugad.weebly.com/uploads/1/3/4/7/134721680/7986918.pdf
    • https://cdn-cms.f-static.net/uploads/4407777/normal_604a85d881b43.pdf
    • https://cdn-cms.f-static.net/uploads/4481166/normal_60116fbe64714.pdf
    • https://foboxujegi.weebly.com/uploads/1/3/4/6/134694162/tubane.pdf
    • https://cdn.sqhk.co/lepudijazur/8LEouig/65511175646.pdf
    • http://tevopose.66ghz.com/how_to_create_preferred_customer_id_in_herbalife.pdf
    • https://rofujerejikuf.weebly.com/uploads/1/3/5/3/135388349/0c050336.pdf
    • https://galekogikelubem.weebly.com/uploads/1/3/1/4/131438025/8727234.pdf
    • https://cdn-cms.f-static.net/uploads/4501509/normal_603b78db6bb00.pdf
    • https://banadibujanozut.weebly.com/uploads/1/3/4/9/134904666/biguf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://potovoz.rf.gd/bhagavad_gita_in_gujarati.pdf
    • http://soreras.epizy.com/bininodobifidibekulitigu.pdf
    • http://xumugipetoje.epizy.com/75512141242.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e137.bin
1b0231f308e2496f517dcb3c70122a77aca657d3006503ce34bd8713a93b63d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE137 5008 bytes
font_01_sfnt_off0000f249.bin
35efbe43566e69dc5d58868ebdc8374ad10134cf77e55eea58c7a1f52923f466		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF249 10452 bytes
font_02_sfnt_off0001160a.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1160A 4324 bytes

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