Malicious PDF — malware analysis report

Static analysis result for SHA-256 499f022af8e3ad5d…

MALICIOUS

PDF

52.6 KB Created: 2020-10-01 11:24:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: cc02c0504cbf84140f74ba745b272c56 SHA-1: 67c42cc553a98d5cafa68069c9ffafc234eb0d50 SHA-256: 499f022af8e3ad5d92c09def2d12c8e6b221e3024c03735cfcda227f836c4c17
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=peter+pan+story+in+english+pdf In PDF document text
    • https://site-1039577.mozfiles.com/files/1039577/34337494273.pdfIn PDF document text
    • https://site-1037175.mozfiles.com/files/1037175/28348539395.pdfIn PDF document text
    • https://site-1038455.mozfiles.com/files/1038455/92875788752.pdfIn PDF document text
    • https://site-1037132.mozfiles.com/files/1037132/84816674482.pdfIn PDF document text
    • https://site-1036699.mozfiles.com/files/1036699/2487125931.pdfIn PDF document text
    • http://muboguxet.feistykraken.com/uploads/1/3/1/1/131164250/f720ddbb10f.pdfIn PDF document text
    • http://jopag.pstechgroup.org/uploads/1/3/1/8/131856158/23465e8c09.pdfIn PDF document text
    • http://tilot.victoriabattagliahofmann.com/uploads/1/3/0/9/130969862/ligovupon.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/f81dd9af-4126-4be3-ae5d-e6aecf55c1dc/8260943598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb8672c3-5f56-4742-a322-2aab8c01a73f/55698713863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88fc535b-e606-429b-b8f0-43ed0d4de689/50546852844.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8892/8150/files/18669996764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2413/7890/files/38251754168.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_off000083a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A3 5196 bytes
SHA-256: 5c197b845af0e2a37a6bf110e3c7f7b293c4f5280aa619998ea33fb97d73c2a4
font_01_sfnt_off00009540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9540 9980 bytes
SHA-256: a220f0796326a9b22e1c019bd4571670470659531461ff7f18101517e5a75c92
font_02_sfnt_off0000b76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB76B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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