Malicious PDF — malware analysis report

Static analysis result for SHA-256 048cb32a0f2d0fae…

MALICIOUS

PDF

40.3 KB Created: 2020-11-06 09:08:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 23b9caf1f8bbcdc182858efd025218d7 SHA-1: 2b91df7a725a6c86fd61a48426d8d3a28aee539a SHA-256: 048cb32a0f2d0faeeaa38dc9da2f5b62418ea34a51a3430f8899b90a966baee7
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://trafftec.ru/123?keyword=google+translate+unblocked PDF link annotation
    • https://panemomozig.weebly.com/uploads/1/3/4/5/134503052/tatufirajusep_sivoxi.pdfIn PDF document text
    • https://vuwuvaxurig.weebly.com/uploads/1/3/4/6/134649086/22d6c7a2334c.pdfIn PDF document text
    • https://sipexagugiresu.weebly.com/uploads/1/3/4/6/134607427/kokusajumowupus.pdfIn PDF document text
    • https://retujesa.weebly.com/uploads/1/3/4/5/134529196/nexumogaxuwalok.pdfIn PDF document text
    • https://xijoxamapapi.weebly.com/uploads/1/3/4/3/134337958/nuvelupob.pdfIn PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/8548352.pdfIn PDF document text
    • https://giruveme.weebly.com/uploads/1/3/4/4/134480937/851abad3ea.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/gokokufoledanusupo.pdfIn PDF document text
    • https://derodaju.weebly.com/uploads/1/3/1/6/131606282/3373360.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/3067697.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/adceb69f51.pdfIn PDF document text
    • https://vivazezege.weebly.com/uploads/1/3/4/0/134041722/bfc689549ea7481.pdfIn PDF document text
    • https://nepufetok.weebly.com/uploads/1/3/1/4/131438640/8947749.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/aae6ecc8-31c0-4766-8693-dc3a132595b4/lijupovogot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7b8c1f2-dacb-43ed-b906-bbe1774febc4/68246424655.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e98eeb-34a7-4edc-8f06-8dc27a6fc089/bedejul.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_off00005d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D31 5340 bytes
SHA-256: e47458528fbea89f2ea6b40db5a7582506f9adc9893a7a9a3f4b146b926144ac
font_01_sfnt_off00006f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6E 10884 bytes
SHA-256: 73daf855ab7d8da97b16a96f3118c6037177167f67f17eb5c3828514f36c19ee

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