Malicious PDF — malware analysis report

Static analysis result for SHA-256 3339db1bc84722c8…

MALICIOUS

PDF

73.7 KB Created: 2021-02-22 03:03:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 35ea227aaed4d52b4c24eb72562479d1 SHA-1: dc970d2ad25c95a553a3da53caf3a9a1ae1f5266 SHA-256: 3339db1bc84722c8adf6e88956c9368dcfee7e073073cb9e0ad03d3b50a1f20a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on dynamic DNS services or free hosting platforms, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=kubota+bx25+service+manual PDF link annotation
    • https://xadupokunarufi.weebly.com/uploads/1/3/2/7/132710624/zogekutaputuj.pdfIn PDF document text
    • https://xizuxikeg.weebly.com/uploads/1/3/0/7/130740292/d4da1ad11ade4.pdfIn PDF document text
    • http://fresh-ita.space/88109042421133tv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5fd9f6394e23d.pdfIn PDF document text
    • http://soul-felt.com/229030523133gxvj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423471/normal_6000db5f333c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379959/normal_5fde560369061.pdfIn PDF document text
    • https://muragifenujokuf.weebly.com/uploads/1/3/1/1/131164382/2708194.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382639/normal_5ff716c64fd6b.pdfIn PDF document text
    • https://falojaba.weebly.com/uploads/1/3/0/7/130776150/091d27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464862/normal_602034b30f0b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482218/normal_5ffc08265aa42.pdfIn PDF document text
    • https://wimazuwog.weebly.com/uploads/1/3/0/7/130740080/jimekefexufigo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://laganomezavarof.epizy.com/64047799090.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_off0000da05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA05 5436 bytes
SHA-256: dcb976be730038eebc13966a6f768770c9bd6ad5a682edee83fe614be6dc684a
font_01_sfnt_off0000ec84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC84 14648 bytes
SHA-256: 658cc8440ffe18fc3af54e1ee70c3ae760270d58c39646c707504bab91fe688b

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