Malicious PDF — malware analysis report

Static analysis result for SHA-256 5640358e0cc63b39…

MALICIOUS

PDF

37.9 KB Created: 2020-11-09 06:09:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 0f059193a95d922d0edca834c9e1c615 SHA-1: 0908e335071db6176cd696bb13f96a9afa34640e SHA-256: 5640358e0cc63b3958db6c8b365f27faaf0ab3149e5e7108a24d95d7940fabb9
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://traffking.ru/123?keyword=courtyard+creations+cushion In PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/dd9b521.pdfIn PDF document text
    • https://xisegebimir.weebly.com/uploads/1/3/4/3/134340076/zoladuri.pdfIn PDF document text
    • https://fejilezujew.weebly.com/uploads/1/3/4/3/134340931/pabadexufaxorozedawa.pdfIn PDF document text
    • https://rinosebamajipem.weebly.com/uploads/1/3/4/6/134694393/48334.pdfIn PDF document text
    • https://sinixamaruxibul.weebly.com/uploads/1/3/4/6/134653816/zexejiwijarij.pdfIn PDF document text
    • https://zabonipe.weebly.com/uploads/1/3/4/4/134487368/vatakuwukuxogisaxeb.pdfIn PDF document text
    • https://sopodepewujo.weebly.com/uploads/1/3/4/3/134340903/sawixoretawe.pdfIn PDF document text
    • https://nipokilalupa.weebly.com/uploads/1/3/4/4/134485501/7714765.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/fake_utility_bill_online.pdfIn PDF document text
    • https://mafebono.files.wordpress.com/2020/11/brooklyn_dodgers_logo_font.pdfIn PDF document text
    • https://temobozuz.files.wordpress.com/2020/11/berugalitozufenus.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_off000053e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53E1 5004 bytes
SHA-256: fdacd65fb1e3761894c3545a299caf8df475a13339274c473d6596a5c1ddf177
font_01_sfnt_off000064e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E0 11588 bytes
SHA-256: 91187be03489e6709fd0eb7e9a8dbc805a4255c1d07e0c172b54847afb78bae6