Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea293c05280132bf…

MALICIOUS

PDF

66.5 KB Created: 2020-12-01 12:33:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a809c0407f8a9d6639d04019177bae49 SHA-1: 14cd010f90fd6fd3bf45b63d138f5bd9aeca0fad SHA-256: ea293c05280132bf628023363a8f1234a3cfa29bf0f4a86b75af9c4c9c62607a
186 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 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://traffking.ru/aws?utm_term=interpreter+vs+compiler+vs+assembler+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383695/normal_5fadf9d62d821.pdfIn PDF document text
    • https://nimimemuxigu.weebly.com/uploads/1/3/4/4/134488465/zopanalopatonu_goxudeletuzaxaf_sudal_tejotoxeme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416672/normal_5faa725fc37cd.pdfIn PDF document text
    • https://vezutokabev.weebly.com/uploads/1/3/4/7/134758566/8898346.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366668/normal_5f882b215f419.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/4589730.pdfIn PDF document text
    • https://wanalupegekiful.weebly.com/uploads/1/3/4/8/134879682/letuzulune-liredexe.pdfIn PDF document text
    • https://xovadodelemowuz.weebly.com/uploads/1/3/1/3/131383330/6034092.pdfIn PDF document text
    • https://guxedujigizos.weebly.com/uploads/1/3/4/7/134735137/gonegabuviv.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/e4d22f1d-0aee-4763-82ef-26bc3fa8d924/mifikewojeti.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/nuwew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/498a374e-468b-4b4a-9a25-d2bda2bd0223/tawazopanew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73a5d13c-4957-4115-8b53-7ff9878e5282/lumokipapakavaduvewu.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_off0000c6ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AD 5436 bytes
SHA-256: 47c43bb87bf9b813947e6769bf38377c497ab1e043595b1808cb376989c2bd3d
font_01_sfnt_off0000d917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD917 10444 bytes
SHA-256: 26935ed632a4dba8636ca9a232360c36e2b1b2d11793a5c74ae3253b1e38f1a6

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