Malicious PDF — malware analysis report

Static analysis result for SHA-256 9de96bf436688062…

MALICIOUS

PDF

119.8 KB Created: 2020-11-14 20:08:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: abdb7bc5fa3ce246e585886a54e6ac2a SHA-1: 2806e1cb3e7645a2806bdfb2bee148abb818fd09 SHA-256: 9de96bf43668806288980814eccea3dc72d28fae2f8f3ce7a53d51219e62753f
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/aws?utm_term=kt+document+template+for+software+project PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384649/normal_5f9c39b9df845.pdfIn PDF document text
    • https://woniwisupu.weebly.com/uploads/1/3/4/2/134266019/tuwibedajilu_lefukit_jalikaderagega_sutesu.pdfIn PDF document text
    • https://teduruperalugo.weebly.com/uploads/1/3/4/3/134320262/wudugakuzizefu_jukigenav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479684/normal_5faba40c23675.pdfIn PDF document text
    • https://xigepeseforala.weebly.com/uploads/1/3/4/5/134508125/24ddd5911b5408d.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/zitevixazezawi.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/945b444e-86d6-47e0-af09-72cbd0a0112d/vafinejo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/725301ae-0e3b-4f42-943d-0e5d392c32c4/92892199128.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e688e76-3422-4d65-ab5b-bdd7f3efe232/kowejoxiwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a3ff30a-12e2-4f7a-a2b9-3da402e6de13/amd_verification_tool_closes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1177a7d9-6e00-491d-a9b2-15fef534bde4/lalipizifexeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b886d920-f190-464e-9827-bf474b287d15/80951985646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a33d955-9f67-4565-b61a-f15e1603a52b/91561883845.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_off0001990f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1990F 5436 bytes
SHA-256: 56078ef167309f4fe51b837fc543b3c83779c13362852743267b1a84b2e55139
font_01_sfnt_off0001ab95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB95 11204 bytes
SHA-256: 9db8ed5232f04192cd5871643c6637d753b1e5eae76ea11fad8696aeb4d563a1

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