Malicious PDF — malware analysis report

Static analysis result for SHA-256 97a55444f88627c2…

MALICIOUS

PDF

35.4 KB Created: 2020-10-15 16:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4bb04d40ed87a78c29b0a89262024806 SHA-1: a64ddd273caf81800294d15b9eac923602009010 SHA-256: 97a55444f88627c2abef3c17cfaca3b20195187cf8567ee1c6d30f517e01aa35
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://ggtraff.ru/123?keyword=thermex+super+silent+plus+manual In PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/5473886.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/rexezigiwer.pdfIn PDF document text
    • https://kenilajapa.weebly.com/uploads/1/3/1/0/131069910/4925866.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3355978.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8709547.pdfIn PDF document text
    • https://welavofewefose.weebly.com/uploads/1/3/0/8/130813025/f0e561e.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/tadib-pepalitegugoj.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/f5d445.pdfIn PDF document text
    • https://zidabowejixu.weebly.com/uploads/1/3/1/1/131163559/8678239.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/3532345.pdfIn PDF document text
    • https://ninukiwipovesot.weebly.com/uploads/1/3/0/9/130969879/givukubemubibuzize.pdfIn PDF document text
    • https://site-1043457.mozfiles.com/files/1043457/7095217203.pdfIn PDF document text
    • https://site-1042731.mozfiles.com/files/1042731/63861092044.pdfIn PDF document text
    • https://site-1042555.mozfiles.com/files/1042555/mipaxematinadifogefo.pdfIn PDF document text
    • https://site-1043160.mozfiles.com/files/1043160/ralijolefinaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f883f116a366.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_5f87fcebb62fe.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/1/0484/2232/2328/files/washing_machine_drain_pan_with_center_drain.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6362/2297/files/vornado_279_large_panel_air_circulator_fan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/3649/6031/files/sakuxakujevel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0783/5303/files/reigns_apk_em_portugues.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_off00004c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C9E 5076 bytes
SHA-256: 73b51c15466773f0b9b20a8e17847694baadaa8c8cda1653ee1d941bbe83516f
font_01_sfnt_off00005dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBB 10180 bytes
SHA-256: 33b881115ad129fa1aa280de1085b300328582bcb115869802006e5a32768c05

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