Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee361ea69a13ff1…

MALICIOUS

PDF

43.6 KB Created: 2020-10-26 13:31:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: aabc4da578532c23281bd4535460a602 SHA-1: 8387cf83e0df4aa696aa0620e347fcb155ca424b SHA-256: dee361ea69a13ff1d3e238cbcd745797e2f297b52f69bc37654603330e5fa2e3
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to known malicious redirector infrastructure or disposable hosting. The document body, though heavily obfuscated, contains URLs that appear to be part of a link farm designed to manipulate search engine results and redirect users to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/aws?keyword=nespresso+vertuo+manual+pdf In PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/9612681.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/wawukujebitit.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/2bbe70a336.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/bewomo.pdfIn PDF document text
    • https://wuwotozon.weebly.com/uploads/1/3/4/3/134315251/dixareluxuk_sojenagizogo.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/90fdb7ca833172.pdfIn PDF document text
    • https://vekaluledezo.weebly.com/uploads/1/3/4/2/134235689/3deedfb.pdfIn PDF document text
    • https://gemenudotipetal.weebly.com/uploads/1/3/2/6/132695720/5463cfdf2c6b85f.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/ed6cb.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/2414342.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/4324389.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/c5cb0a4cd849.pdfIn PDF document text
    • https://siwizapetodid.weebly.com/uploads/1/3/4/0/134041585/4856516.pdfIn PDF document text
    • https://mekuxiwefajup.weebly.com/uploads/1/3/0/7/130739023/950f5d1ba8e13.pdfIn PDF document text
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/d51f2446ddddd6e.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/3897154.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/52c2b83b-b6c8-49dd-b1f7-b29ca22cff1a/mamujiwimurerufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3783fbbc-dc35-47b3-b19b-8107de17e3a6/75435547402.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/65087733564.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/92581909776.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/52338914590.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/13232843252.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/gutirod.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCA 5048 bytes
SHA-256: e8054bbeec1d35a6bb21529a0cb4aa1396b00a13ec5a78e5340d78cbf69ee7b0
font_01_sfnt_off00006ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE9 12164 bytes
SHA-256: 3a305b9e86820c14813ed45d441e49456cec3e6c450785a4b8ea5412eb2b711a
font_02_sfnt_off000092c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92C5 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333