Malicious PDF — malware analysis report

Static analysis result for SHA-256 e661cbc32570318f…

MALICIOUS

PDF

39.3 KB Created: 2020-10-04 06:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 39ea585a8c44a1f1a6b048d1fe1420a8 SHA-1: f80ac96d7ef845253e79b6ba735f023ac2e19f3d SHA-256: e661cbc32570318fd95f9a427d90b00578a1a31feee871c9b26ea0c06b0a75a1
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=numeros+ganhadores+de+free+lotto In PDF document text
    • http://vomop.3rdavewine.com/uploads/1/3/2/6/132696147/binufifobonex.pdfIn PDF document text
    • http://dapefa.utahstudentnurse.org/uploads/1/3/1/4/131438304/vezoziwofu-nobizobenofusu.pdfIn PDF document text
    • http://files.pegbailey.com/uploads/1/3/1/3/131379550/wusuzutolenifebus.pdfIn PDF document text
    • http://files.jazzmenmusicandgallery.com/uploads/1/3/1/1/131164558/jexusesuma.pdfIn PDF document text
    • http://sigom.themerchantsofvenus.com/uploads/1/3/2/6/132683438/wuzaxola.pdfIn PDF document text
    • https://site-1039251.mozfiles.com/files/1039251/pojewuvuw.pdfIn PDF document text
    • https://site-1039769.mozfiles.com/files/1039769/44288806834.pdfIn PDF document text
    • https://site-1036929.mozfiles.com/files/1036929/xovugawanupifoxiwuwo.pdfIn PDF document text
    • https://site-1038349.mozfiles.com/files/1038349/99504200737.pdfIn PDF document text
    • https://site-1037026.mozfiles.com/files/1037026/puzagobinolorepaveziwo.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/f6885f9d-8b5e-4480-aaa8-248d78bb59d4/20727145212.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88b61bd1-95bb-4dfd-a176-dbc5e882fabb/39094031344.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e650efe5-3d12-4c31-a21f-42d00c4047e0/zemalekewiwafojo.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_off00005aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA8 5288 bytes
SHA-256: 096d9ad0c19725dc7c720c2a450e362020c3ce4f512c956f100e805ed70d60c4
font_01_sfnt_off00006c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7B 10688 bytes
SHA-256: c44c0ee29dbf92dfa2a3caa4ab22816cdbd8ba83cc319a7f5c4174026292fbb0