Malicious PDF — malware analysis report

Static analysis result for SHA-256 f604fdc427a125ce…

MALICIOUS

PDF

42.6 KB Created: 2020-10-29 12:09:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3845a3ba0c7b67e7d16d8bac9f9ee5ed SHA-1: 20a6103cafc6fc46a2500b03817ff048b2ad588c SHA-256: f604fdc427a125cebe668ddbfc960761986de5b7101f50babcfa8f7b900b4db8
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document was flagged as malicious by an ML classifier and contains a significant number of embedded links, many pointing to disposable hosting. One critical heuristic identified links to known malicious redirector infrastructure. The document body, though partially corrupted, contains a URL that is also present in the link farm, suggesting a coordinated effort to redirect users to potentially harmful content.

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://ttraff.link/pify?keyword=casta%25C3%25B1a+de+indias+en+ingles In PDF document text
    • https://nejalebemenogun.weebly.com/uploads/1/3/1/0/131070187/47e14cba8a.pdfIn PDF document text
    • https://sepenunaxob.weebly.com/uploads/1/3/0/7/130776074/visutelagusege.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374364/normal_5f93d22d26171.pdfIn PDF document text
    • https://mizunawakore.weebly.com/uploads/1/3/1/4/131406356/3160057.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368230/normal_5f8bbef7efa08.pdfIn PDF document text
    • https://pusazaninad.weebly.com/uploads/1/3/4/3/134358808/8581ab9a.pdfIn PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/7e3bbe9.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/5058540.pdfIn PDF document text
    • https://vakasuvarepem.weebly.com/uploads/1/3/4/3/134328097/jezuforatav.pdfIn PDF document text
    • https://rilebowiteb.weebly.com/uploads/1/3/3/9/133986594/kefewibu.pdfIn PDF document text
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/gisatuzuwaminowe.pdfIn PDF document text
    • https://turikiripejuz.weebly.com/uploads/1/3/4/5/134501804/4583865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378621/normal_5f8bf1591d12c.pdfIn PDF document text
    • https://lisoletabe.weebly.com/uploads/1/3/4/5/134511207/podafonutivaf.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/nukexifepejisox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368949/normal_5f92c332d85ab.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/dijomebasapav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_5f8a97aaf11f2.pdfIn PDF document text
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/zeleteruleful_wotavatak_zufomuvinuwa.pdfIn PDF document text
    • https://wojeribexojuxu.weebly.com/uploads/1/3/1/8/131856158/92d43cb92.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/miterunewon.pdfIn PDF document text
    • https://sitizoxibe.weebly.com/uploads/1/3/4/3/134317871/8898889.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ae7b2a6-7614-472b-b017-b554b0fb92a3/military_field_manuals_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/420f6c39-b3fc-408a-a5c5-72434b6e89a5/62819113037.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9868a72-3ec7-4856-bf1b-a922c77db0b5/8471843650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a19446fe-0962-42cb-838d-c0b96a24d128/libro_de_patologia_oral.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_off00006660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6660 5012 bytes
SHA-256: 0259cd22be035f6d700431e2937c0e24a2bf3148e7c8efcdb98eba53f0dc2c62
font_01_sfnt_off0000773a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x773A 10880 bytes
SHA-256: 29700c052ad425a401cfc3159a33db6a0661ce24e6cc5aff4d16ce3ced1528d3

Open this report in the interactive analyzer, or submit your own file for analysis.