Malicious PDF — malware analysis report

Static analysis result for SHA-256 16a96370e6317867…

MALICIOUS

PDF

40.0 KB Created: 2020-10-09 22:18:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f159fab4bf68a92fe539ed777986e198 SHA-1: e8c421e75372d1330d5d4cf50657e9ab4b1c5aad SHA-256: 16a96370e6317867bdf3273966962ca37867181383c479af5fb1835e651aef7a
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=paris+chic+style+guide In PDF document text
    • http://nisobifa.drheatherortiz.com/uploads/1/3/1/3/131379655/xurawilupidiv.pdfIn PDF document text
    • http://kofaxeri.starfenceandgate.com/uploads/1/3/1/6/131606739/f1c834246ec.pdfIn PDF document text
    • http://files.menwhopaint.com/uploads/1/3/0/7/130775458/d460eb0471.pdfIn PDF document text
    • https://site-1037138.mozfiles.com/files/1037138/81042121950.pdfIn PDF document text
    • https://site-1043172.mozfiles.com/files/1043172/norunevivurosowufodugop.pdfIn PDF document text
    • https://site-1036965.mozfiles.com/files/1036965/zosogefovi.pdfIn PDF document text
    • https://site-1036742.mozfiles.com/files/1036742/67276029637.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f476bc7e-459b-4f03-b5ea-1c5646c810ba/17243309716.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e137c3f7-a215-4567-81e9-89344b1a0ead/jetit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dc3d7d3-3be6-488d-9e1c-0d87eadb1b00/radokikuzenofukofegavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f181a7d1-18ba-4de2-a1a5-e7e57138c4c8/jepepodesujawovimanibumu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26cb9771-069a-4c4d-84b5-11e6b2a3ac19/84046882851.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1af4065-ace9-4319-8959-b010770e8868/88616409724.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f25e1913-b9bf-415c-95eb-c5ed5ef30ff7/73661181198.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1625a47-d91a-4851-b7f0-67fd975d23ca/57215908049.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5072 4972 bytes
SHA-256: 4253679845186723f740884b6bfc494fce6609f37f7cf9ead01d78cddefbe204
font_01_sfnt_off0000616a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x616A 10756 bytes
SHA-256: df7df3b9592d239fa05efa0c2367cdd0cb4369a97c7e41f1f2cdfb94fd9acb3f
font_02_sfnt_off00008557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8557 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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