Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ab654bd3bc4d43…

MALICIOUS

PDF

57.3 KB Created: 2020-09-30 16:40:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e32c28dce3d043cf9fee03dce6b5133c SHA-1: 8d6b6cef1713b41c3112aacd55ca6ea2ec2dceda SHA-256: 37ab654bd3bc4d43eb967af178c33944ccf6b584868c515a0c9f323ccef77c0f
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=environmental+analytical+techniques+pdf In PDF document text
    • http://fibozu.chrisann-jeff.com/uploads/1/3/1/6/131606289/vurofajit.pdfIn PDF document text
    • http://vureg.ginny-frings.com/uploads/1/3/0/8/130874598/sonume.pdfIn PDF document text
    • http://files.womini.org/uploads/1/3/0/7/130740297/juzebejawega.pdfIn PDF document text
    • http://files.limogescollections.com/uploads/1/3/0/7/130775215/6603534.pdfIn PDF document text
    • http://files.kogumasamune.co/uploads/1/3/1/8/131856108/7f062389e4.pdfIn PDF document text
    • https://site-1036917.mozfiles.com/files/1036917/xavenusovupi.pdfIn PDF document text
    • https://site-1037077.mozfiles.com/files/1037077/kaxefoliri.pdfIn PDF document text
    • https://site-1038890.mozfiles.com/files/1038890/18732116400.pdfIn PDF document text
    • https://site-1036830.mozfiles.com/files/1036830/devujagawawarinakofagi.pdfIn PDF document text
    • https://site-1037238.mozfiles.com/files/1037238/padutomutolenevojukew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3094/4671/files/54935156838.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8344/7966/files/xijexemabanegali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/gizarezegugi.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_off0000a13c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA13C 5640 bytes
SHA-256: 859419b05d5bbb57a68206042cdc7580a750808f824775ce48944cfc95f245d3
font_01_sfnt_off0000b44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB44D 10504 bytes
SHA-256: a425bee4fbadc70e9135e5a3bd265faf20226e1859fcc4aea4a53b8abae86aa5

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