Malicious PDF — malware analysis report

Static analysis result for SHA-256 c49edf294be56e2e…

MALICIOUS

PDF

38.6 KB Created: 2020-11-05 16:53:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c72153b3c1d500584b953c7d798b2312 SHA-1: de8f787412283ec24d3966c52f75fd52bc724cb0 SHA-256: c49edf294be56e2efa8452391077729ff39cf4c7737f46aba04d9c098e7e6566
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by 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 1.0000

Heuristics 5

  • 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://traffine.ru/aws?keyword=2+square+root+of+60+simplified PDF link annotation
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/7af12562e.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/wirexanusir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426823/normal_5f9e3f0ea6615.pdfIn PDF document text
    • https://zonepebitebebo.weebly.com/uploads/1/3/4/3/134369254/novabuketub.pdfIn PDF document text
    • https://sibikobibe.weebly.com/uploads/1/3/4/0/134040949/fuxiwutap-jiwanam.pdfIn PDF document text
    • https://milorupubi.weebly.com/uploads/1/3/4/3/134317418/bubazoditizute-bunazupirut-wukukamadul-zebimukutuji.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jasamejug-jenutuzudemeluf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379614/normal_5f8c9dd1cd39d.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/581402.pdfIn PDF document text
    • https://kegegofelev.weebly.com/uploads/1/3/2/6/132681159/rivewetivinog.pdfIn PDF document text
    • https://vekejuritikoj.weebly.com/uploads/1/3/1/8/131857631/tapirerurapomibutar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388421/normal_5f9469e9cd7da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369304/normal_5f87f9ec76df4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383565/normal_5f9551d05b351.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/18f9a931-6079-42af-b6d1-f6baaf819636/denova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dda1bb33-d251-4cd1-963a-3699a9bdf709/89262921607.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_off000057fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57FA 5644 bytes
SHA-256: 8a179e48201c68792b0c9b93d6b2960144dc88407609e7e13912955d372b2ad1
font_01_sfnt_off00006b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B12 10020 bytes
SHA-256: fdb6e6c43b58451b9c0c750ae83dd0a208966acffaab09c7a797e845dd0d872f

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