Malicious PDF — malware analysis report

Static analysis result for SHA-256 03950c839dfb4e3c…

MALICIOUS

PDF

42.0 KB Created: 2020-10-15 00:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 10874df1201dc65529170398ede43d07 SHA-1: e6444ad3f382471456b1a02992a31d67b03f1089 SHA-256: 03950c839dfb4e3cced7f663123884bdd6e882389bd6bc3fc50c5835969fb2ea
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/pify?keyword=myotomes+and+dermatomes+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5f872a6dded6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f8766f67968d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368225/normal_5f8769d7000e0.pdfIn PDF document text
    • https://site-1043205.mozfiles.com/files/1043205/5823089260.pdfIn PDF document text
    • https://site-1041485.mozfiles.com/files/1041485/19636977635.pdfIn PDF document text
    • https://site-1043335.mozfiles.com/files/1043335/dobelatij.pdfIn PDF document text
    • https://site-1039748.mozfiles.com/files/1039748/jimakubesobipezotavuboris.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1515306.pdfIn PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/bibesekukemugedovofa.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/de03b.pdfIn PDF document text
    • https://site-1048184.mozfiles.com/files/1048184/36886012371.pdfIn PDF document text
    • https://site-1040174.mozfiles.com/files/1040174/jolonabuvurudigezukudan.pdfIn PDF document text
    • https://site-1039967.mozfiles.com/files/1039967/buzobavekidotopirotiturij.pdfIn PDF document text
    • https://site-1037113.mozfiles.com/files/1037113/xaxabut.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/dd6335d1-f7cb-4496-9719-d7637d1c4367/97232807108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/816c9d97-a52d-467e-ab40-222b00496c3b/pudokawoxepidorojixobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50a4f910-6d8b-4306-b050-7d681f34164b/xopaxiforilita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/accd1293-e307-457e-ab9f-46fd15bc4a37/foxuroritiwubikogedofezuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/902e1c3a-5a15-47b5-a3b2-51a5e580d293/50340814119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/590de6a2-22aa-4e0b-bbed-0321cf3031cd/mujaramotukudizidogaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e30919a-4327-462e-9491-b489faa402e6/sisuvozodadufaxamumawuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ead96922-5c0e-4e44-9eab-c0dd1bdaceaf/36592656815.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_off000066c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C0 5264 bytes
SHA-256: c0314324e71dcd637a43da86f3a89c0cb4ae794197da94a1121aec68f729de31
font_01_sfnt_off0000789e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x789E 9932 bytes
SHA-256: a8084f97375fb5aa34a0ad6ba839d013881dba34b4726400d226c7500e0d6a69