Malicious PDF — malware analysis report

Static analysis result for SHA-256 2252357ad14d39c3…

MALICIOUS

PDF

79.1 KB Created: 2020-11-17 01:54:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fa8381b181cdf62a339ba89b02b424a3 SHA-1: da0e32f7960019a3c76b33611c54315bdb5cd436 SHA-256: 2252357ad14d39c3b763a19b0c0933c51ca0022dcfeb1ce5d3c56985bc163a48
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffset.ru/strik?utm_term=12+tribes+of+israel+and+their+symbol PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462345/normal_5fa888d058220.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457279/normal_5fa03a960d704.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_5f9bf1802912b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369920/normal_5f9acb4b54d27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416787/normal_5f9ffe9d27d12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389384/normal_5fa7dcb02b74e.pdfIn PDF document text
    • https://sosegesidor.weebly.com/uploads/1/3/4/4/134465043/rakumu.pdfIn PDF document text
    • https://zadiletewus.weebly.com/uploads/1/3/4/5/134522124/wopolimevil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504839/normal_5fafd0fdcae38.pdfIn PDF document text
    • https://bikipejuroninoj.weebly.com/uploads/1/3/4/4/134448394/raremoduwagetiwun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371267/normal_5f901131c82ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375700/normal_5f9b81a0ee49f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459162/normal_5fa54d0761648.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/fulomufimikim/66336800081.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/biorefinery_process.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE812 3120 bytes
SHA-256: 1ad02b79c7091a558633aca35b79c18c4801c8f97407e2d39b41a6bac3159f63
font_01_sfnt_off0000f345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF345 5476 bytes
SHA-256: d02ce11b1d0a19001a96bc7c3e8b6d6e2e3b1dd93ca859f7ffcba054be69d943
font_02_sfnt_off000105be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BE 13560 bytes
SHA-256: 5becacd15995612cb833ccb0b6c2c7552189d15329c42e87ea7c5af2bfcc1d95

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