Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2eb21e565d88a3c…

MALICIOUS

PDF

83.6 KB Created: 2021-04-03 07:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: dc5d9760fd7b78f0a16d434c2d9451a8 SHA-1: 18780dfa68bd5816667903b44a383505a93a287d SHA-256: e2eb21e565d88a3c4e6d85bc22fcbea98ef37623b35e2f01bcad0aa468b64b50
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://resalured.ru/123?utm_term=gradus+floor+trims+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459805/normal_5ff7e233af22c.pdfIn PDF document text
    • http://mediaverifiedbadge.com/35613907834r1obe.pdfIn PDF document text
    • https://wopeduvolevim.weebly.com/uploads/1/3/0/7/130776212/8134248.pdfIn PDF document text
    • https://rusizatigaj.weebly.com/uploads/1/3/4/0/134041601/magevubufana.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414868/normal_604710b64b0bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494669/normal_6053e8ca8d7cd.pdfIn PDF document text
    • https://mazokaru.weebly.com/uploads/1/3/5/3/135303974/773d049307d4e.pdfIn PDF document text
    • http://philonio.online/909348509998akpj.pdfIn PDF document text
    • https://gisogademumes.weebly.com/uploads/1/3/1/3/131379615/nukugobu_jekelunofewil_zerebu_rexopozelufilok.pdfIn PDF document text
    • https://ramimuluvisefo.weebly.com/uploads/1/3/0/7/130775145/c66a104620ef.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://vewavuxusiwidew.weebly.com/uploads/1/3/4/5/134587075/c9335.pdfIn PDF document text
    • https://fozabezadako.weebly.com/uploads/1/3/4/6/134639332/68193331377d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416331/normal_602df3667aa34.pdfIn PDF document text
    • https://mazofowi.weebly.com/uploads/1/3/4/3/134312703/50bc6ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373243/normal_6032f91c33a22.pdfIn PDF document text
    • http://teasmall.space/fivotugonepupivodanaw2gsu.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://uploads.strikinglycdn.com/files/60b1fa49-5c7f-47cd-803b-6b71e1a8d38d/ponniyin_selvan_movie_first_look_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7da33c2d-f50b-482b-8585-53721a0dd323/esv_study_bible_books_a_million.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2a07096-c033-4908-82f3-a3405f9633f6/how_to_thread_a_bobbin_brother_ls_2125.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_off0000fd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD45 5036 bytes
SHA-256: 9b53618747d1da0833579e4e0c916d1b834e48d52950a30f564408a61414ab5a
font_01_sfnt_off00010e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6E 10596 bytes
SHA-256: a0fde5dc3aa3abe8ed30db4d2ab9d5e3e1278fa69454b51afff03ca08fa06f9f
font_02_sfnt_off000132ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132AD 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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