Malicious PDF — malware analysis report

Static analysis result for SHA-256 96bb40afef2cdf5e…

MALICIOUS

PDF

45.6 KB Created: 2020-10-16 13:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 827bb40a8b119aadf1c6f7fb11762105 SHA-1: a0e9054fe6110d83aa3f812676e3fd0470038382 SHA-256: 96bb40afef2cdf5e29b2913e73661ac484277287d7a901806e630e9276f2dba2
184 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many pointing to disposable domains and potentially malicious redirectors, as indicated by the PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the structure suggests an attempt to leverage link farms for SEO manipulation or to distribute further malicious 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://gettraff.ru/wb?keyword=oath%20of%20vayuputras In PDF document text
    • https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/0dd290cc75.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/zudaludasuxejefar.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/jibigamefomoni.pdfIn PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/vizumopobab_goxawuvedijizi_sijalozofukudu.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/kozexafon.pdfIn PDF document text
    • https://bewupoterefi.weebly.com/uploads/1/3/1/3/131380107/pitikukibek.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/tidevi-muxajamireja-jilatudiwixa.pdfIn PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/81da3448fb64dc.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/digokasawuj-jipamuputevuf.pdfIn PDF document text
    • https://wepeweguwerixum.weebly.com/uploads/1/3/1/8/131856135/38c98cb1a698685.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/8279107.pdfIn PDF document text
    • https://pepotoxuxomupav.weebly.com/uploads/1/3/1/4/131483830/ae6209b98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368221/normal_5f87bc3e7a6b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373271/normal_5f88fba5f26f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_5f8939a6161d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f88c1acb08a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373511/normal_5f8947121e639.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/36ed4c9d-8199-4cfb-aca2-71ecff957850/62850655041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d3c426c-b604-4c2d-8cdd-0d897638d95e/5450912701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dbee876-a1d8-4ad4-a28b-884d39cce4e4/23718004136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6db110e-3b20-407a-bfa4-7443c1839fff/tubavevugokozusinozop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15eda92f-248f-4df9-87ee-4f7f44ef37ba/ruwusip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a154d5d-da0d-4f7f-ac1d-13bbe36bc153/rafewek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9166e71-52a2-4a21-9c61-28bac3aa9a22/luzapuzodelozejazubevub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/956cd123-b7a6-4ad2-9ea5-6301f2a70cbf/waduneno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d422216d-4ca5-4bb4-9c90-9f5216e9f2ab/goxagigodeforo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91e9f59b-a948-4935-8a21-3e50f5008dbc/30267719162.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_off000073d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D8 5148 bytes
SHA-256: 213ea6c89a4c62b7f5cb0996adf80e4a3aca5a074903436d73cdb3480c39c85a
font_01_sfnt_off00008566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8566 10260 bytes
SHA-256: 7f9e7b0486fc91d1ef085a66a991d2250a6e7e273c878d6371bf02523e12a09d

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