Malicious PDF — malware analysis report

Static analysis result for SHA-256 79c5719dab9ac015…

MALICIOUS

PDF

58.5 KB Created: 2020-10-16 19:48:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: dfa19e4c248a7afa578dce66d49e829f SHA-1: 650907b57cd18afbf86c22b793b6204fa3612f39 SHA-256: 79c5719dab9ac01594fbd6680f6f500287fe9809c07380790d26614eae17a93a
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/123?keyword=organic+electronics+for+neuromorphic+computing+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372963/normal_5f894f44a5ee8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371005/normal_5f883ec8ce6fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f88f13de5a6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367625/normal_5f893ce9c83c2.pdfIn PDF document text
    • https://wovasemuzusalej.weebly.com/uploads/1/3/1/6/131636629/8039758.pdfIn PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/bogexoga-vokufat-lodewegipogubu-goterafov.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/divili_dapixi.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/vopisovaz.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/monirafulowafix.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/caa64.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/622580.pdfIn PDF document text
    • https://javezevefumutew.weebly.com/uploads/1/3/2/7/132740470/pujazi.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/008d198.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6444/2521/files/48821657665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0392/7973/files/jack_and_jill_story_book_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9001/6424/files/molazefogas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cface3a-9133-4d11-921d-470309e352e0/jurolow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85cad10f-1f01-4163-be17-33816ac576e7/sonuxinelufadasipoke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fe3f324-3b71-4110-a69e-c09208a66420/34044487546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ace49ce3-3271-4d0a-89b2-4828d3ddec47/tivukebubibajeligapibopek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdea5fc1-e4ec-4bcc-bc39-3c0781346eb2/gufaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4c24cfe-0de6-4e83-b0db-516c004d24cf/luvatif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/851eb5bd-4e4b-4244-92b1-f2e22fca06db/risubavif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eded30a1-b883-4c1b-b6c4-4cd3f601c6e1/60365222090.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_off0000a61b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA61B 5596 bytes
SHA-256: ed80a4d4ad5e082144e26a92b0f672401997c59d4ac37d5ee2c68c03371c0fdb
font_01_sfnt_off0000b8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8F3 10240 bytes
SHA-256: 3017bd5c8c5feb8cd1301da16407da0d11a2231fd487906dd3e447b030c85f1c