Malicious PDF — malware analysis report

Static analysis result for SHA-256 de7c912729bf36b6…

MALICIOUS

PDF

43.7 KB Created: 2020-10-03 08:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3dc1b4b5b92c8ee567bbe84d05b396d2 SHA-1: 32f8e0632452cda497fa14d7864c0762c867bf1e SHA-256: de7c912729bf36b6b79b9381602a8d5beb3325f3ed1bc1c0ec9bb85df86424c3
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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/strik?keyword=pdf+to+word+online+for+free In PDF document text
    • http://files.napashuttlelimousine.com/uploads/1/3/1/6/131636923/faxabewakifu.pdfIn PDF document text
    • http://files.hedux.org/uploads/1/3/0/7/130740517/f4ebe.pdfIn PDF document text
    • http://novej.cmrpl.org/uploads/1/3/1/3/131383753/9cd1d4ac.pdfIn PDF document text
    • https://site-1038529.mozfiles.com/files/1038529/84043129300.pdfIn PDF document text
    • https://site-1036816.mozfiles.com/files/1036816/22216895748.pdfIn PDF document text
    • https://site-1036783.mozfiles.com/files/1036783/bigujemapigevos.pdfIn PDF document text
    • https://site-1038808.mozfiles.com/files/1038808/lavaz.pdfIn PDF document text
    • http://files.palmerstexas.com/uploads/1/3/0/7/130738548/majikavaxu_xanadigij_gosejum_xabifuv.pdfIn PDF document text
    • http://files.bigcreekkennels.com/uploads/1/3/1/4/131406849/zusefo.pdfIn PDF document text
    • http://sepowakid.geologicalsocietyct.org/uploads/1/3/0/8/130874519/8070316.pdfIn PDF document text
    • http://sotuliw.eastbaypreschools.com/uploads/1/3/0/7/130776728/eabba064d6.pdfIn PDF document text
    • http://sozixekoz.apachetruckclub.com/uploads/1/3/0/8/130873851/vigiwive_zujejulesuzazos_molewoxala_kutitudejeb.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/ef76501e-c105-4639-b5d3-282e3804281e/2489739156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af94190e-ce25-4709-bdbe-dde07a4164cb/26736836404.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/848c466b-d35b-4a91-9b84-94f79cac3530/21066750833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0e68aa6-dcbe-4901-b9c6-111795f862e1/97707970162.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38166733-8762-4f36-b064-36763cf76b5b/varapelejufakowikam.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_off00006ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDE 4604 bytes
SHA-256: 3ac79504379849940721c9095b562325280dd4068bc697904ad7213b52493864
font_01_sfnt_off00007ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA8 10324 bytes
SHA-256: 66b133091252bdec09957a675b860cc953392b8067b678e2de24b9fe69e402b1

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