Malicious PDF — malware analysis report

Static analysis result for SHA-256 97cc18963bf1a3e8…

MALICIOUS

PDF

67.2 KB Created: 2020-11-17 07:46:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2f7e8048c43ebfa4bb1f03b5d575e785 SHA-1: 9849df36ff8168451eee11dbe45951f2f114943f SHA-256: 97cc18963bf1a3e8d565a222a3636507dba8bfada1b677e44cd30a9ec88d1b74
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://traffine.ru/123?utm_term=function+non+function+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403264/normal_5f9c9df41b6e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387573/normal_5f9035a340293.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/4135560.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404528/normal_5fa784caa1d70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369640/normal_5f8f42e862739.pdfIn PDF document text
    • https://fokomowopijav.weebly.com/uploads/1/3/4/6/134643156/tosedepexow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385848/normal_5f925748207c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374207/normal_5f9542583d2c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454041/normal_5fa53809b4388.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369664/normal_5f99091f510be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425491/normal_5faddfe3bb875.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383805/normal_5f9015d01a6fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409417/normal_5fa1ffb8cd336.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370989/normal_5f996c5e0407c.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/lijopavexanuse/pdf_files_download_search.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_off0000c9e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E0 4836 bytes
SHA-256: e05c1e8841a8824368353d14b9cf1caf2be47732745c5e5e79fa27f67330ed87
font_01_sfnt_off0000da70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA70 11052 bytes
SHA-256: 3f6b17349e411e06d9fccbf7d45ed83be467db010542d3a85bd29f7a9fdea3b8

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