Malicious PDF — malware analysis report

Static analysis result for SHA-256 b23c14d68d34e991…

MALICIOUS

PDF

70.8 KB Created: 2021-05-28 09:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ea3cc5adde155c1bd7f3256a46b4e979 SHA-1: c6f93f705f18343fa2569b6065092b9e0c8f56e5 SHA-256: b23c14d68d34e991e30fd8422850c87606ed6efbc608fe894d6761eb1c581456
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's content, though heavily obfuscated, appears to be a lure related to tractor data, likely directing users to malicious sites for further exploitation or credential harvesting.

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://zajinet.ru/strik?utm_term=tractor+data+kubota+m7060 PDF link annotation
    • https://palufiboninu.weebly.com/uploads/1/3/6/0/136020493/66da5c30734.pdfIn PDF document text
    • https://dilaxala.weebly.com/uploads/1/3/4/8/134865885/namazugivivuzuxesi.pdfIn PDF document text
    • https://gatilesajegume.weebly.com/uploads/1/3/1/0/131070678/38b7058a.pdfIn PDF document text
    • https://gibunuvupu.weebly.com/uploads/1/3/4/7/134746488/2083088.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410206/normal_5fdeaed1cb513.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425915/normal_605e1cf500925.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500001/normal_5ffe8eac62be4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409244/normal_5fd99de1c546e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487658/normal_606b718dc32f6.pdfIn PDF document text
    • https://dibegojiziwezed.weebly.com/uploads/1/3/0/7/130739363/gijanodum.pdfIn PDF document text
    • https://zozolexiwu.weebly.com/uploads/1/3/4/3/134343356/3388990.pdfIn PDF document text
    • https://ralugegab.weebly.com/uploads/1/3/4/8/134888835/mimobixewabon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_60570c335bdac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452154/normal_603955f520980.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/86dad087-e492-46a3-a04a-59af97e9f0cd/vexilaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76b264ae-f288-4c3a-9a0e-dd4f35510e36/64785834458.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9484b81-488b-42ad-802c-055bc35103e7/key_themes_of_dr_jekyll_and_mr_hyde.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD700 5404 bytes
SHA-256: d3879f96e2e5812cde01c8a9703e7fc99046d95b3d35b354eee7d45b3dff9dea
font_01_sfnt_off0000e955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE955 10796 bytes
SHA-256: 4574c97924de09e3df69e4978acd1a34ef6a2b9c2d993e229d734432df100e66

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