Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9c1c017cbfac4ef…

MALICIOUS

PDF

49.4 KB Created: 2020-11-06 03:10:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 198cd4ded5effb521a5fc483401d4376 SHA-1: 8c8adc22206f0685f414451aaf5ecf3c31b01948 SHA-256: b9c1c017cbfac4ef37169b251b0998d1e1b2ecb8b2ca62abbf7c2dc7c6efc686
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?keyword=warming+blanket+system PDF link annotation
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/pubufibezunekita.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/tetokesajemidop.pdfIn PDF document text
    • https://belonimilulufaf.weebly.com/uploads/1/3/4/4/134403367/jasesenesodun.pdfIn PDF document text
    • https://bugadubotureje.weebly.com/uploads/1/3/4/4/134468403/ee31aa6ce3537aa.pdfIn PDF document text
    • https://fadevigobawu.weebly.com/uploads/1/3/4/3/134346767/f72f25acf041.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/6370017b-a6fd-400e-9aaf-95b226f6e1ce/91904635806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b496f4d-4334-404f-bdc8-f6d4c898df27/fukawufi.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/tubemate_apk_for_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c34dcd4-21ec-4473-9b5d-8d4aa140f5ff/55275217716.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/2460/2055/files/lemosasakowogeva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f39bafad-951a-4758-88a9-193c4df792e2/sotakivudavuwaxozavogolij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8435/2162/files/riduduzugenat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebce9e2d-d8a9-45d5-92b3-03164dc03872/the_lightning_tree_barn_circleville_oh.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_off00007eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB2 5324 bytes
SHA-256: f8793f4a879bd22ef9d25a32fa5ce9b4e1cbaedcd30131fb2a8ab3088af6e8f8
font_01_sfnt_off000090cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90CB 11560 bytes
SHA-256: dc4c573f2973dcc9cacffdf74092cbe383557934c7a1ada51be72d7ec50e38d9

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