Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b2d5a8b29899e57…

MALICIOUS

PDF

42.5 KB Created: 2020-10-03 15:34:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c338abc0a46c9afc908a11a81e483329 SHA-1: 6a31bfb123be69d95f6233cabdd77fc7a70f5393 SHA-256: 2b2d5a8b29899e572c97f57c729ab31c1b0283ac074bbc03af8264f96c7a393d
184 Risk Score

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/strik?keyword=aznor+electrodomesticos+burgos In PDF document text
    • http://files.owlhavenfarm.com/uploads/1/3/1/4/131410872/jusukopunitip-wasutuv-xorolomosawoge-rutisegisole.pdfIn PDF document text
    • http://sejerufu.allsaintsvista.org/uploads/1/3/1/4/131437046/78692d1bf744e.pdfIn PDF document text
    • http://files.theyogatreegardner.com/uploads/1/3/1/1/131163550/sevitewenevo.pdfIn PDF document text
    • http://xowuwu.jingyouecon.com/uploads/1/3/0/7/130740206/tujokuratedexu.pdfIn PDF document text
    • https://site-1036993.mozfiles.com/files/1036993/24486511243.pdfIn PDF document text
    • https://site-1037044.mozfiles.com/files/1037044/5512737946.pdfIn PDF document text
    • https://site-1036972.mozfiles.com/files/1036972/dumugis.pdfIn PDF document text
    • https://site-1038699.mozfiles.com/files/1038699/88261523002.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/5d1e7e25-586b-4228-8033-463dc315f493/87356138712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0e24b0a-4bf2-40bf-afd7-ecd33c0dd733/17878028156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cff976d-757d-46f7-9272-1da864b1882c/88277570926.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5de6eea0-f2eb-4deb-8001-2a66b1880404/74839803295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff1288dc-32df-46a9-9728-8352db035b35/30294414439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebe3ec91-fdfc-4b0f-be73-effb166641ea/37561417021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c47a8e-b8d9-4c4b-9799-7993533fa318/82994382802.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84cdc582-62d8-41ca-a442-8861b0914ba1/tegizufojivobejupuwasa.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_off0000664b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x664B 5228 bytes
SHA-256: 4bc8879a3c7b1bee3cb97bdad187a3c5c7da309e16d945dfdf1d55b475ab651d
font_01_sfnt_off00007800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7800 10948 bytes
SHA-256: ce7f1f49bcd4df5189ebc38a735c620f3414f65202665798423b28ec640ec634

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