Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8c3f817e9fa8d29…

MALICIOUS

PDF

42.4 KB Created: 2020-10-16 18:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 119840b0f39560f0ccadc74a0fb880b7 SHA-1: f477bb6ba50ca6b502fe5c92d5188aec710db9c1 SHA-256: c8c3f817e9fa8d29f5d43d85e27579143cafbe9eb21a71456d1d968125d72e7b
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://gettraff.ru/123?keyword=fresco+play+tcs+app+android In PDF document text
    • https://fewevivib.weebly.com/uploads/1/3/0/8/130813821/2987289.pdfIn PDF document text
    • https://baletepo.weebly.com/uploads/1/3/0/7/130776023/8005743.pdfIn PDF document text
    • https://migirebunimalab.weebly.com/uploads/1/3/1/3/131383914/lixuporivosu.pdfIn PDF document text
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/napofujewub.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/nemodesitunaj-xafopifoz.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/4fd30b.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/4573418.pdfIn PDF document text
    • https://fusesekomufe.weebly.com/uploads/1/3/1/6/131606177/422337.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/kadupe_ripovu_jozovagazemewe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5f899b833dab5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f8743276b498.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367296/normal_5f874b109d189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f880c762efee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f870b5b7f402.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/zidebesirolabavo.pdfIn PDF document text
    • https://lotagixowila.weebly.com/uploads/1/3/1/1/131164100/fozefinowaweko.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/c25f730.pdfIn PDF document text
    • https://rixokofumi.weebly.com/uploads/1/3/1/3/131380985/1985869.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/bc9fd1ff-b27f-4028-ac17-642b5f390ac3/gugenijig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/182a22ab-5d05-4f86-8b1d-7f09fae3aaf2/36917493776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca680977-a6f4-426e-884b-a472a2c729d5/xebuzezipatareter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d15c8021-42da-4a9d-823e-db4f349b98dc/xenutamozaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f9b0bf1-4c13-430d-884b-336a35c054ef/57630930091.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_off000067b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B1 5124 bytes
SHA-256: d931572e793a24b7c92c3d49d78d2203acf32ca4393fc25a8bb1257383f3cf54
font_01_sfnt_off00007932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7932 10296 bytes
SHA-256: 90dd5632219ada2629a3cf089c486e48cdb87feaeb306911725d243fa420cad0