Malicious PDF — malware analysis report

Static analysis result for SHA-256 48a9cfe6a40e5c61…

MALICIOUS

PDF

50.1 KB Created: 2020-10-14 05:19:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9be80a99934688df704b4ed2f64fb9c4 SHA-1: 2d643ae40628d65b076049a28d3966772ab53a7b SHA-256: 48a9cfe6a40e5c612e2ae1f39d93bef4c983dbc5f05668c92a853d7a13ba029b
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=coding+python+on+android+tablet In PDF document text
    • https://site-1039443.mozfiles.com/files/1039443/82820068269.pdfIn PDF document text
    • https://site-1040528.mozfiles.com/files/1040528/99831694225.pdfIn PDF document text
    • https://site-1040892.mozfiles.com/files/1040892/53417615885.pdfIn PDF document text
    • https://site-1037219.mozfiles.com/files/1037219/xoduparejaxipodufiz.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/novovuxosijuzuz_wofabunutigepuw_dugulelura.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/613a711ec7ef.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/govorikepudago-gixidawele-wawep-xoxebilepadevu.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/6431815.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/1429013.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/49760ecf-c0dd-4eaf-8aea-27064e5ea6cf/riwenegadiwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db9885bb-7349-41fc-a74b-a927b197afb7/11850444318.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95351ba2-0068-4ef2-9036-ec1b5d037d73/vokenevojometimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/484780aa-6c5c-4d0a-b3b7-572ed086a527/56464736454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bfc39f5-250f-4c09-b11f-7b44e6874bba/ritagadak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6618cc3e-8e14-4ed9-ad8a-67a67de1f6b1/41808908567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6462dee6-1e70-4c23-91d3-a21c3a555761/94475046904.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_off00008287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8287 5192 bytes
SHA-256: e588cb17b0c01bf59282fd9a652ec28cd6ccfb1a03c13154f53ebdb26344d9d0
font_01_sfnt_off00009421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9421 11884 bytes
SHA-256: 4921d9269789e064d32eb3847a0d59ff661771fa41dea581a9bdec785b1a6433

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