Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6aa65df2acff82a…

MALICIOUS

PDF

66.2 KB Created: 2021-03-10 10:47:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e188c12d02e1eb1c06844233a7febfaa SHA-1: 2a24caaffa50670f34c2ed247cad1c8f23ba31ec SHA-256: e6aa65df2acff82ae3d3225ff3b777adf37821d53edbd0c53261a484882a4476
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs, with one prominent URL pointing to 'xezojetit.ru'. The document's structure and the presence of many links suggest it is designed to manipulate search engine results or lead users to potentially harmful content. No scripts were extracted, but the PDF structure itself is leveraged for malicious purposes.

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://xezojetit.ru/wix?keyword=nixon%2527s+meat+market PDF link annotation
    • https://puvomowaja.weebly.com/uploads/1/3/4/3/134318832/jiwawironofisepubeli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487632/normal_6001907aed911.pdfIn PDF document text
    • https://muzezibabut.weebly.com/uploads/1/3/0/7/130739211/9f45282c7.pdfIn PDF document text
    • https://bugagage.weebly.com/uploads/1/3/5/3/135330359/3241401.pdfIn PDF document text
    • https://vuvitolivudiru.weebly.com/uploads/1/3/2/7/132712253/7218343.pdfIn PDF document text
    • https://gadefume.weebly.com/uploads/1/3/4/3/134337819/11a6b.pdfIn PDF document text
    • http://idealica-italiaufficiale.website/new_mary_poppins_movie_musicwzbob.pdfIn PDF document text
    • http://ch-redirect.icu/pit_bike_motors_for_saleao9ao.pdfIn PDF document text
    • http://baby-slings.ru/nugifuweridowanazubekorex281i0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369503/normal_5ff2680741d0c.pdfIn PDF document text
    • http://gerisekazaleg.22web.org/96519904431.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/0c942383-ecc9-4ceb-94c6-3a3bce1b8fd6/samsung_nu7100_50_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3eec888-bd5c-4350-8cb2-16687522bfd9/zobitezupibujopir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd58df5c-0479-42a8-8712-0c32496352e5/dosigovosepemifojedig.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/bow_wow_like_you_free.pdfIn PDF document text
    • http://pulupalu.epizy.com/75115777823.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/architectural_symbols_identification_sheet.pdfIn PDF document text
    • http://tinegupufijogun.epizy.com/how_to_pay_for_a_rental_car.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_off0000c801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC801 4932 bytes
SHA-256: e2ac8d28255be4dee7e57f315432ed1bde9e09ad8d7aa340d8c70b0c6fc3fc48
font_01_sfnt_off0000d8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BF 10316 bytes
SHA-256: af713cb6ca14b327e9336b4d1bac5df1be277ae25446590e187290e2fd7e108a

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