Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7fcf6ed57d65dbe…

MALICIOUS

PDF

44.4 KB Created: 2020-10-28 21:31:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 6f289266703873462994990a1fafc6f8 SHA-1: f6edffbac25f5830dbcfda1f5274f56352da4c96 SHA-256: f7fcf6ed57d65dbe7ecd81db559d1d34c2f68ae84b0d83e7c1fde2c7e931f61f
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=graco+nautilus+car+seat+installation+video In PDF document text
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/mubanudolazenud_lilugosesuje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386606/normal_5f96e759e742c.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/kejabu.pdfIn PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/furololonuj.pdfIn PDF document text
    • https://gosedizomomusuw.weebly.com/uploads/1/3/4/3/134313056/jigafedajinap_tadaxetadeju_guxuv_tanefufuguw.pdfIn PDF document text
    • https://jurizimobijagi.weebly.com/uploads/1/3/0/8/130874317/c67a1b51b43.pdfIn PDF document text
    • https://femevidawivuk.weebly.com/uploads/1/3/1/0/131071063/punan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412891/normal_5f9593b6c309e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369782/normal_5f888cd0e0e27.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/2842d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385412/normal_5f8fe2a03f7b7.pdfIn PDF document text
    • https://fobopogukigu.weebly.com/uploads/1/3/4/3/134366855/kubax.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006e30.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006e30.bin)
    • https://uploads.strikinglycdn.com/files/83cec4e2-6d01-4a94-abba-04395fdcfa0f/92158348382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fff9824a-256b-4fc2-809c-43bc8a9156ce/64720015261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8787b01a-7a6a-489a-8884-9e469042c98f/30089313706.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/87005144209.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/colorimetric_assay.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/physics_textbooks_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/64982223991.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b236436a-b736-455e-abf5-b9162ea2c1b7/56902096776.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/knee_stretches.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e452d27-36f1-4170-a2eb-354079abdb6c/34685134476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d5cb55a-a59a-400c-8bf6-d66d9a24a7b5/3971480263.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 extracted file (font_00_sfnt_off00006e30.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E30 5024 bytes
SHA-256: eea83edfbec2f8e06b8ccca729f965f0c9dd009e8531297beaf164f85550d713
font_01_sfnt_off00007f58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F58 10812 bytes
SHA-256: d9bee052701e789e222560686620a8a4a51ccd3675dffc566af96c9e72a17268