Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad98062dca8661c…

MALICIOUS

PDF

67.3 KB Created: 2020-11-22 12:18:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ba5ffd45c4b294d405e6837486fd965d SHA-1: dda68e5e58aa2d1b8f334f1328844f514962168b SHA-256: 1ad98062dca8661c8280f06586e6875f990844544a5bd6bec5dd1d95d4de1062
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/123?utm_term=college+preparatory+program+washington PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381105/normal_5fae5d6a44c03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370068/normal_5f8cc1a93957d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401696/normal_5fb529c1e83c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369187/normal_5f8c143b60466.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388160/normal_5fb77595db4e9.pdfIn PDF document text
    • https://wovodolu.weebly.com/uploads/1/3/4/8/134861979/09ba12f623f6.pdfIn PDF document text
    • https://lewedizo.weebly.com/uploads/1/3/4/6/134610291/mezarimor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369487/normal_5fb59f73f1438.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368989/normal_5f8bcd5e60082.pdfIn PDF document text
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/23d7de1d8e521f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451760/normal_5fb9199b4c612.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408001/normal_5fad7ca6dfa1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374857/normal_5f8a0a6feea21.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCACB 5332 bytes
SHA-256: d8751dc20fa8b3eacdafe86a65061edc06c5fa41c4b6f29bbb662ddc135bbb91
font_01_sfnt_off0000dcd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD5 10492 bytes
SHA-256: 0ed9256b814180bb44c03eda7a56c239c27f15c96d81a5f6badcdea1d636c009

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