Malicious PDF — malware analysis report

Static analysis result for SHA-256 751e8379b956f38d…

MALICIOUS

PDF

42.2 KB Created: 2020-10-14 13:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5dbb6d78f919f21ee9de69c92c3712ab SHA-1: 326be773ed6285bb3611684115291f66c8b9a766 SHA-256: 751e8379b956f38dbb9eee8474ba5d7488bdae6e494ec30fe5c95111295fe83f
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://cctraff.ru/strik?keyword=pre+linguistic+skills+pdf In PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/tigosorivibisakoxu.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/devuxupujikeninaferi.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nimemoroligamaj-tafixidupara.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rotesojelunemiroto.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jasamejug-jenutuzudemeluf.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/foburadip.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ligewajinaxi.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://cdn.shopify.com/s/files/1/0481/3340/6871/files/kenmore_coldspot_106_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74180759-2209-41e4-b02e-509a53a13493/95822059369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dfed3a9-6988-4e84-a6c9-06c254e2931a/zuvibutotuxifup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63cb8a64-a39e-4807-ae0f-93cfd0d5f783/47847363109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b5967c4-487c-49e4-93a4-ba518eb68ae9/kerapulalasijaxipixunav.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_off00005be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE3 4948 bytes
SHA-256: b6a87314c362ac45e696568dee065aeef2c6b6db95b72221dfdeff58436171fc
font_01_sfnt_off00006cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC7 9820 bytes
SHA-256: 2c671a88de8b5fc264c4990f0fa63d0616b08750a5ac066795942512cbe2a183
font_02_sfnt_off00008e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E53 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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