Malicious PDF — malware analysis report

Static analysis result for SHA-256 896e147c0d23afdd…

MALICIOUS

PDF

46.0 KB Created: 2020-10-09 10:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1c0c30aa406073166d234e92f8e3e80c SHA-1: b75c4dc107b138d28ed2af200a0c603367f40d28 SHA-256: 896e147c0d23afdda1d67ea1243386c771189835d80392c1f9ec64eb7728d9da
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://ggtraff.ru/strik?keyword=anycast+m100+user+manual In PDF document text
    • https://site-1043237.mozfiles.com/files/1043237/begaxemutefanibusobudo.pdfIn PDF document text
    • https://site-1039604.mozfiles.com/files/1039604/zefopajuni.pdfIn PDF document text
    • https://site-1038961.mozfiles.com/files/1038961/70952275768.pdfIn PDF document text
    • http://pizex.oldironclub.org/uploads/1/3/1/4/131483170/besaniramuxutin.pdfIn PDF document text
    • http://mexakovo.muckabout.ca/uploads/1/3/0/8/130873922/9085016.pdfIn PDF document text
    • http://vetad.petalandstemflowers.com/uploads/1/3/0/9/130969656/tolod.pdfIn PDF document text
    • http://fewapima.cupcakefgm.com/uploads/1/3/0/7/130776760/rokibuwolubi.pdfIn PDF document text
    • http://wigetetu.rushingspringshoa.com/uploads/1/3/1/3/131384281/tapopuno.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/da56031a-f07a-4838-b4fb-990d015451ae/1447371888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eae171cb-6306-4c72-8e64-4af9b524ad89/54065195536.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce0ca94c-edd1-43ec-a332-1633a4220caf/1963774692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7364/2406/files/964697252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/sigma_509_manual_dansk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6153/8727/files/speech_general_purpose_vs_specific_purpose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8518/0327/files/tefaf_art_market_report_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2619/7923/files/electromagnetic_spectrum_worksheet_1.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_off000076c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76C4 5228 bytes
SHA-256: 0345b7c708cc019edc1de6ba284be187651aba3e29fc976be410e36e75a5798b
font_01_sfnt_off00008884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8884 10000 bytes
SHA-256: e8f0bd1888de6e5623456655001c7a582bc3b427489f93b2ac7bc25b8831ece6

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