Malicious PDF — malware analysis report

Static analysis result for SHA-256 0759991977f97731…

MALICIOUS

PDF

45.9 KB Created: 2020-10-26 19:45:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 8ec2ba6e833684f2f32bdaa2f279ee70 SHA-1: 29e983fdbd9be6758c3306d86d49c95d99dd2554 SHA-256: 0759991977f97731f567c9594b9bd91d6b2fd4bbfa42a4d88530df4315b52cb6
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=arma+3+tactical+guide In PDF document text
    • https://rilebowiteb.weebly.com/uploads/1/3/3/9/133986594/b84d9c433.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/galoji.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/da1f9c360025b98.pdfIn PDF document text
    • https://fefupitemoxawa.weebly.com/uploads/1/3/4/4/134480784/3867183.pdfIn PDF document text
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/2707678.pdfIn PDF document text
    • https://vorenamu.weebly.com/uploads/1/3/4/2/134265490/jijixaju_lukudedofa_bolamufeka.pdfIn PDF document text
    • https://worobewunit.weebly.com/uploads/1/3/1/4/131406731/redubeduwe-povunupife-woromunoxijiwe-kitise.pdfIn PDF document text
    • https://lituveso.weebly.com/uploads/1/3/4/3/134362288/8821829.pdfIn PDF document text
    • https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/df69f0d995.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/32e063a95e.pdfIn PDF document text
    • https://mejefarekobuk.weebly.com/uploads/1/3/4/3/134338461/makebofakuw-zovut-wotafokoja-gemalasa.pdfIn PDF document text
    • https://guxesawaxogego.weebly.com/uploads/1/3/4/3/134314991/3936335.pdfIn PDF document text
    • https://ronumotesagazuw.weebly.com/uploads/1/3/4/3/134373959/bekamuwuxapuvenadoli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382771/normal_5f92ff8d4fd8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375203/normal_5f8f2f6629609.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_5f939a6178d2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f87268786739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_5f894faf27bd8.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000774a.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000774a.bin)
    • https://s3.amazonaws.com/pisik/aashto_roadside_design_guide_2006_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/escala_de_alvarado_pediatria.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/maha_kala_bhairava_stotram_lyrics.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_off0000774a.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000774a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x774A 5236 bytes
SHA-256: da6b67f409c053beb232019b88f487b97a59bdac54196907e956991ca7d37086
font_01_sfnt_off000088ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88EF 9708 bytes
SHA-256: ed6583b2115526462c3584c9a8154af4a66e4afd5648c13ea243db262eaff6a9